Citazione Stile APA (7a Edizione)

Babbie, E. (1989). The practice of social research (5th.ed.). Wadsworth.

Citazione stile Chigago Style (17a edizione)

Babbie, Earl. The Practice of Social Research. 5th.ed. Belmont: Wadsworth, 1989.

Citatione MLA (9a ed.)

Babbie, Earl. The Practice of Social Research. 5th.ed. Wadsworth, 1989.