Dyfyniad APA

Fowler, F. J. (2009). Survey research methods (4th ed.). Sage Publications.

Dyfyniad Arddull Chicago

Fowler, Floyd J. Survey Research Methods. 4th ed. Thousand Oaks: Sage Publications, 2009.

Dyfyniad MLA

Fowler, Floyd J. Survey Research Methods. 4th ed. Sage Publications, 2009.

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