APA-referens (7:e uppl.)

BABBIE, E. (1983). The practice of social research.-- ed.3. Wadsworth.

Chicago-referens (17:e uppl.)

BABBIE, Earl. The Practice of Social Research.-- Ed.3. California: Wadsworth, 1983.

MLA-referens (9:e uppl.)

BABBIE, Earl. The Practice of Social Research.-- Ed.3. Wadsworth, 1983.