APA (7th ed.) Zitazioa

Babbie, E. R. (1990). Survey research methods (2nd ed.). California.

Chicago Style (17th ed.) Zitazioa

Babbie, Earl R. Survey Research Methods. 2nd ed. Belmont: California, 1990.

MLA (9th ed.) Zitazioa

Babbie, Earl R. Survey Research Methods. 2nd ed. California, 1990.