APA (7th ed.) Zitazioa
Duck, S. (1993). Individuals in relationships. Sage Publications.
Chicago Style (17th ed.) Zitazioa
Duck, Steve. Individuals in Relationships. London: Sage Publications, 1993.
MLA (9th ed.) Zitazioa
Duck, Steve. Individuals in Relationships. Sage Publications, 1993.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.