References
Friction of a Rolling Soccer Ball . (n.d.). University of North Carolina at Chapel Hill. Retrieved November 28, 2012, from http://www.unc.edu/~ncrani/friction1.htm
Klyosov, A. A. (n.d.). Wood-Plastic Composites - Anatole A. Klyosov - Google Books. Google Books. Retrieved November 28, 2012, from http://books.google.ca/books?id=KmuK4w_D7UUC&pg=PA370&lpg=PA370&dq=coefficient+of+friction+grass+to+leather&source=bl&ots=Cz6O452tsv&sig=Xry2u_17jqiNecQoFES_-Q0NRaQ&hl=en&sa=X&ei=-a6yUI6wEaWp2gW_kICwCA&ved=0CFcQ6AEwBQ#v=onepage&q=coefficient%20of%20fricti
Newton's Three Laws of Motion . (n.d.). Newton's Three Laws of Motion . Retrieved November 12, 2012, from csep10.phys.utk.edu/astr161/lect/history/newton3laws.html
Physics Of Soccer. (n.d.). Real World Physics Problems And Solutions. Retrieved November 28, 2012, from http://www.real-world-physics-problems.com/physics-of-soccer.html
Physics of...Soccer . (n.d.). Conclusion . Retrieved November 13, 2012, from lc3.littlechute.k12.wi.us/High%20School/Academics/Science%20Department/Janssen/Physics%20Of%20Project/projects/soccerandrewphil/index.html
Rigsby, B. (n.d.). Physics. Soccer Balls Explained at SoccerBallWorld.com. Retrieved November 28, 2012, from http://www.soccerballworld.com/physics.htm
Sizes. (n.d.). Soccer Balls Explained at SoccerBallWorld.com. Retrieved November 28, 2012, from http://www.soccerballworld.com/sizes.htm
Wilkins, A. (n.d.). "Impossible" Soccer Kick Leads to New Physics Equation | Playbook | Wired.com. wired.com . Retrieved November 28, 2012, from http://www.wired.com/playbook/2010/09/impossible-soccer-kick-leads-to-new-physics-equation/
soccer ball sizes specification chart for soccer inflatables.. (n.d.). mini soccer balls, football custom logo promotional soccer ball. Retrieved November 28, 2012, from http://www.soccerball.com.pk/ball-specification.htm
 Elert, G. (n.d.). Length of a football field (soccer pitch). hypertextbook.com. Retrieved November 28, 2012, from http://hypertextbook.com/facts/2002/JenniferYu.shtml
APA formatted
Friction of a Rolling Soccer Ball . (n.d.). University of North Carolina at Chapel Hill. Retrieved November 28, 2012, from http://www.unc.edu/~ncrani/friction1.htm
Klyosov, A. A. (n.d.). Wood-Plastic Composites - Anatole A. Klyosov - Google Books. Google Books. Retrieved November 28, 2012, from http://books.google.ca/books?id=KmuK4w_D7UUC&pg=PA370&lpg=PA370&dq=coefficient+of+friction+grass+to+leather&source=bl&ots=Cz6O452tsv&sig=Xry2u_17jqiNecQoFES_-Q0NRaQ&hl=en&sa=X&ei=-a6yUI6wEaWp2gW_kICwCA&ved=0CFcQ6AEwBQ#v=onepage&q=coefficient%20of%20fricti
Newton's Three Laws of Motion . (n.d.). Newton's Three Laws of Motion . Retrieved November 12, 2012, from csep10.phys.utk.edu/astr161/lect/history/newton3laws.html
Physics Of Soccer. (n.d.). Real World Physics Problems And Solutions. Retrieved November 28, 2012, from http://www.real-world-physics-problems.com/physics-of-soccer.html
Physics of...Soccer . (n.d.). Conclusion . Retrieved November 13, 2012, from lc3.littlechute.k12.wi.us/High%20School/Academics/Science%20Department/Janssen/Physics%20Of%20Project/projects/soccerandrewphil/index.html
Rigsby, B. (n.d.). Physics. Soccer Balls Explained at SoccerBallWorld.com. Retrieved November 28, 2012, from http://www.soccerballworld.com/physics.htm
Sizes. (n.d.). Soccer Balls Explained at SoccerBallWorld.com. Retrieved November 28, 2012, from http://www.soccerballworld.com/sizes.htm
Wilkins, A. (n.d.). "Impossible" Soccer Kick Leads to New Physics Equation | Playbook | Wired.com. wired.com . Retrieved November 28, 2012, from http://www.wired.com/playbook/2010/09/impossible-soccer-kick-leads-to-new-physics-equation/
soccer ball sizes specification chart for soccer inflatables.. (n.d.). mini soccer balls, football custom logo promotional soccer ball. Retrieved November 28, 2012, from http://www.soccerball.com.pk/ball-specification.htm
 Elert, G. (n.d.). Length of a football field (soccer pitch). hypertextbook.com. Retrieved November 28, 2012, from http://hypertextbook.com/facts/2002/JenniferYu.shtml
APA formatted