APA (7th ed.) Zitazioa

(1979). Contemporary theories about the family: Research-based theories. Free Pr.

Chicago Style (17th ed.) Zitazioa

Contemporary Theories About the Family: Research-based Theories. New York: Free Pr, 1979.

MLA (9th ed.) Zitazioa

Contemporary Theories About the Family: Research-based Theories. Free Pr, 1979.