APA (7th ed.) Zitazioa
Penner, C. L., & Penner, J. (1992). Sex facts for the family. Word Publishing.
Chicago Style (17th ed.) Zitazioa
Penner, Clifford L., eta Joyce Penner. Sex Facts for the Family. Dallas: Word Publishing, 1992.
MLA (9th ed.) Zitazioa
Penner, Clifford L., eta Joyce Penner. Sex Facts for the Family. Word Publishing, 1992.
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