Lua APA (7ú heag.)

VAUS D A DE. (2003). SURVEYS IN SOCIAL RESEARCH (5TH.). RAWAT PUBLICATIONS.

Lua i Stíl Chicago (17ú heag.)

VAUS D A DE. SURVEYS IN SOCIAL RESEARCH. 5TH. NEW DELHI: RAWAT PUBLICATIONS, 2003.

Lua MLA (9ú heag.)

VAUS D A DE. SURVEYS IN SOCIAL RESEARCH. 5TH. RAWAT PUBLICATIONS, 2003.

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