Mangoine, T. W. (1995). Mail surveys: Improving the quality V. 40. Sage Publications.
Dyfyniad Arddull ChicagoMangoine, Thomas W. Mail Surveys: Improving the Quality V. 40. New Delhi: Sage Publications, 1995.
Dyfyniad MLAMangoine, Thomas W. Mail Surveys: Improving the Quality V. 40. Sage Publications, 1995.
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