APA (7th ed.) Zitazioa
Bell, R. R. (1968). Studies in marriage and the family. Crowell.
Chicago Style (17th ed.) Zitazioa
Bell, Robert R. Studies in Marriage and the Family. New York: Crowell, 1968.
MLA (9th ed.) Zitazioa
Bell, Robert R. Studies in Marriage and the Family. Crowell, 1968.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.