Knight, J. F. (1979). What a married couple should knew about sex. Pacific Press.
Παραπομπή σε μορφή Chicago (17η εκδ.)Knight, John F. What a Married Couple Should Knew About Sex. Mountain View: Pacific Press, 1979.
Παραπομπή σε μορφή MLA (9th εκδ.)Knight, John F. What a Married Couple Should Knew About Sex. Pacific Press, 1979.
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