APA (7th ed.) Zitazioa
Babbie, E. R. (1986). The practice of social research (4th ed.). Wadsworth Pub. Co..
Chicago Style (17th ed.) Zitazioa
Babbie, Earl R. The Practice of Social Research. 4th ed. Belmont, Calif.: Wadsworth Pub. Co., 1986.
MLA (9th ed.) Zitazioa
Babbie, Earl R. The Practice of Social Research. 4th ed. Wadsworth Pub. Co., 1986.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.