APA (7th ed.) Citation

Getty, E., & Delsohn, S. (1988). If I knew then what I know now-- so what? Contemporary Books.

Chicago Style (17th ed.) Citation

Getty, Estelle, and Steve Delsohn. If I Knew Then What I Know Now-- so What? Chicago, Ill: Contemporary Books, 1988.

MLA (9th ed.) Citation

Getty, Estelle, and Steve Delsohn. If I Knew Then What I Know Now-- so What? Contemporary Books, 1988.