United States Croquet Association (USCA) 
Description of Nine-Wicket Backyard Croquet, Six-Wicket American Croquet, Six-Wicket International Croquet, and Golf Croquet.
http://www.croquetamerica.com/Edinburgh Croquet Club
Brief outline of the game.
http://www.ccir.ed.ac.uk/~fmi/croquet.html
Masters Games
rules of the game.
http://www.mastersgames.com/rules/croquet-rules.htm
Oakley Woods Croquet Equipment
What is croquet? A bit of history, short glossary, International Six-Wicket Croquet, American Six-Wicket Croquet, Golf Croquet, American Nine-Wicket Croquet.
http://www.oakleywoods.com/whatis/aboutcroquet.htm
Jersey Croquet Club
History, attractions, and descriptions of the game.
http://www.mnlg.com/jcc/frames/theGame.html
United States Croquet Association (USCA)
Overview of croquet in America, from backyard game to worldclass sport.
http://www.croquetamerica.com/croquet/introduction/
