APA (7th ed.) Citation

Westheimer, R. K. (2001). Sex for dummies (2nd ed.). IDG Books Worldwide.

Chicago Style (17th ed.) Citation

Westheimer, Ruth K. Sex for Dummies. 2nd ed. Foster City, Calif: IDG Books Worldwide, 2001.

MLA (9th ed.) Citation

Westheimer, Ruth K. Sex for Dummies. 2nd ed. IDG Books Worldwide, 2001.