Cita APA (7th ed.)
Babbie, E. (1995). The practice of social research (7th.ed.). Wadsworth.
Cita Chicago (17th ed.)
Babbie, Earl. The Practice of Social Research. 7th.ed. Belmont: Wadsworth, 1995.
Cita MLA (9th ed.)
Babbie, Earl. The Practice of Social Research. 7th.ed. Wadsworth, 1995.
Atenció: Aquestes cites poden no estar 100% correctes.