Cita APA (7a ed.)

Babbie, E. R. (1998). The practice of social research (8. ed.). Wadsworth.

Cita Chicago Style (17a ed.)

Babbie, Earl R. The Practice of Social Research. 8. ed. Belmont, Calif. [u.a.]: Wadsworth, 1998.

Cita MLA (8a ed.)

Babbie, Earl R. The Practice of Social Research. 8. ed. Wadsworth, 1998.