Fowler, F. J. (2002). Survey research methods. Thousand Oaks, Calif: Sage Publications.
Trích dẫn kiểu ChicagoFowler, Floyd J. Survey Research Methods. Thousand Oaks, Calif: Sage Publications, 2002.
Deismireacht MLAFowler, Floyd J. Survey Research Methods. Thousand Oaks, Calif: Sage Publications, 2002.
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