APA (7th ed.) Zitazioa
Penner, C., & Penner, J. (2004). Sex 101: Getting your sex life off to a great start. W Publishing Group.
Chicago Style (17th ed.) Zitazioa
Penner, Cliford, eta Joyce Penner. Sex 101: Getting Your Sex Life off to a Great Start. Tennessee: W Publishing Group, 2004.
MLA (9th ed.) Zitazioa
Penner, Cliford, eta Joyce Penner. Sex 101: Getting Your Sex Life off to a Great Start. W Publishing Group, 2004.
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