APA-viite (7. p.)

Babbie, E. R. (1979). The practice of social research (2nd. ed.). Wadsworth.

Chicago-viite (17. p.)

Babbie, Earl R. The Practice of Social Research. 2nd. ed. Carlifornia: Wadsworth, 1979.

MLA-viite (9. p.)

Babbie, Earl R. The Practice of Social Research. 2nd. ed. Wadsworth, 1979.