Citazione Stile APA (7a Edizione)

Earl, B. (2001). The practice of social research (8th ed.). Wadsworth.

Citazione stile Chigago Style (17a edizione)

Earl, Babbie. The Practice of Social Research. 8th ed. Australia: Wadsworth, 2001.

Citatione MLA (9a ed.)

Earl, Babbie. The Practice of Social Research. 8th ed. Wadsworth, 2001.