Dyfyniad APA

Eichhorn, J. (2021). Survey research and sampling. SAGE Publications.

Dyfyniad Arddull Chicago

Eichhorn, Jan. Survey Research and Sampling. Thousand Oaks: SAGE Publications, 2021.

Dyfyniad MLA

Eichhorn, Jan. Survey Research and Sampling. SAGE Publications, 2021.

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