- http://en.wikipedia.org/wiki/Association_football
- http://en.wikipedia.org/wiki/Laws_of_the_Game_(association_football)
- http://en.wikipedia.org/wiki/History_of_association_football
- http://en.wikipedia.org/wiki/Association_football_pitch
- http://www.youtube.com/watch?v=4fEMTFaXAD0
- http://www.youtube.com/watch?v=4Ic6X4M8K_0
