APA (7th ed.) Zitazioa
Worthington, E. L. (1987). Counseling for unplanned pregnancy and infertility. Word Books.
Chicago Style (17th ed.) Zitazioa
Worthington, Everett L. Counseling for Unplanned Pregnancy and Infertility. Waco, Tex.: Word Books, 1987.
MLA (9th ed.) Zitazioa
Worthington, Everett L. Counseling for Unplanned Pregnancy and Infertility. Word Books, 1987.
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