Penner, C., & Penner, J. (1994). 52 ways to have fun, fantastic sex: A guidebook for married couples. Thomas Nelson Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPenner, Clifford, और Joyce Penner. 52 Ways to Have Fun, Fantastic Sex: A Guidebook for Married Couples. Tennessee: Thomas Nelson Publishers, 1994.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPenner, Clifford, और Joyce Penner. 52 Ways to Have Fun, Fantastic Sex: A Guidebook for Married Couples. Thomas Nelson Publishers, 1994.
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