APA-referens (7:e uppl.)

Babbie, E. R. (2001). The practice of social research (9th ed.). Wadsworth Thomson Learning.

Chicago-referens (17:e uppl.)

Babbie, Earl R. The Practice of Social Research. 9th ed. Belmont, Calif: Wadsworth Thomson Learning, 2001.

MLA-referens (9:e uppl.)

Babbie, Earl R. The Practice of Social Research. 9th ed. Wadsworth Thomson Learning, 2001.