Cita APA (7a ed.)

Babbie, E. R. (1979). The practice of social research. Wadsworth.

Cita Chicago Style (17a ed.)

Babbie, Earl R. The Practice of Social Research. Belmont, Calif.: Wadsworth, 1979.

Cita MLA (9a ed.)

Babbie, Earl R. The Practice of Social Research. Wadsworth, 1979.