Lua APA (7ú heag.)
Babbie, E. R. (1986). The practice of social research (4th ed.). Wadsworth Pub. Co..
Lua i Stíl Chicago (17ú heag.)
Babbie, Earl R. The Practice of Social Research. 4th ed. Belmont, Calif.: Wadsworth Pub. Co., 1986.
Lua MLA (9ú heag.)
Babbie, Earl R. The Practice of Social Research. 4th ed. Wadsworth Pub. Co., 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.