Lua APA (7ú heag.)

SELLTIZ, C. . [. a. Research methods in social relations.-- Ed.Revisi. Holt.

Lua i Stíl Chicago (17ú heag.)

SELLTIZ, Claire [et al]. Research Methods in Social Relations.-- Ed.Revisi. New York: Holt.

Lua MLA (9ú heag.)

SELLTIZ, Claire [et al]. Research Methods in Social Relations.-- Ed.Revisi. Holt.

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