Lua APA (7ú heag.)

Wagenaar, T. C., & Babbie, E. (1989). Practicing social research (5th ed.). Wadsworth.

Lua i Stíl Chicago (17ú heag.)

Wagenaar, Theodore C., agus Earl Babbie. Practicing Social Research. 5th ed. California: Wadsworth, 1989.

Lua MLA (9ú heag.)

Wagenaar, Theodore C., agus Earl Babbie. Practicing Social Research. 5th ed. Wadsworth, 1989.

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