7v7 – Small Sided Laws of Game
https://cdn2.sportngin.com/attachments/document/0127/5531/Small_Sided_Laws_of_the_Game_-_2017_.pdf
9v9 - Differences between 9v9 to 11v11 Games
http://assets.ngin.com/attachments/document/0113/0267/Differences-Between-9v9-To-11v11-Games-2015.pdf
11v11 - FIFA Laws of the Game
http://static-3eb8.kxcdn.com/documents/60/Laws%20of%20the%20Game_16-17_Digital_Eng.pdf
FIFA Law
Changes for 11v11 - Effective 2017
http://static-3eb8.kxcdn.com/assets/documents/IFAB_laws_of_the_game_changes.pdf