Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

Babbie, Earl. The Practice of Social Research. 9th ed. Australia: Wadsworth, 2001.

Cita MLA (9th ed.)

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