Lua APA (7ú heag.)

Alreck, P. L. (2004). The survey research handbook. McGraw-Hill.

Lua i Stíl Chicago (17ú heag.)

Alreck, Pamela L. The Survey Research Handbook. McGraw-Hill, 2004.

Lua MLA (8ú heag.)

Alreck, Pamela L. The Survey Research Handbook. McGraw-Hill, 2004.

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