APA aipamena

Earl Babbie. (2007). Practice of Social Research. Belmont, CA: Wadsworth.

Chicago Style aipamena

Earl Babbie. Practice of Social Research. Belmont, CA: Wadsworth, 2007.

MLA aipamena

Earl Babbie. Practice of Social Research. Belmont, CA: Wadsworth, 2007.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.