APA (7th ed.) Citation

Ghosananda, Edmonds, & Mahoney. (1991). Step by Step. Parallax Press.

Chicago Style (17th ed.) Citation

Ghosananda, Edmonds, and Mahoney. Step by Step. California: Parallax Press, 1991.

MLA (9th ed.) Citation

Ghosananda, et al. Step by Step. Parallax Press, 1991.