APA (7th ed.) Citation

St. Andre, R. E. (1993). Simple machines made simple. Teacher Ideas Press.

Chicago Style (17th ed.) Citation

St. Andre, Ralph E. Simple Machines Made Simple. Englewood, Colo.: Teacher Ideas Press, 1993.

MLA (9th ed.) Citation

St. Andre, Ralph E. Simple Machines Made Simple. Teacher Ideas Press, 1993.