APA (7th ed.) Zitazioa
Nicolson Paula. (1990). Applied psychology for social workers (2nd ed.). Macmillan.
Chicago Style (17th ed.) Zitazioa
Nicolson Paula. Applied Psychology for Social Workers. 2nd ed. London: Macmillan, 1990.
MLA (9th ed.) Zitazioa
Nicolson Paula. Applied Psychology for Social Workers. 2nd ed. Macmillan, 1990.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.