Roth, R. A. (1981). How to conduct surveys, follow-up studies, and basic data collection in evaluation studies. Univ. of America Pr.
Cita Chicago Style (17a ed.)Roth, Robert A. How to Conduct Surveys, Follow-up Studies, and Basic Data Collection in Evaluation Studies. Washington, DC: Univ. of America Pr, 1981.
Cita MLA (9a ed.)Roth, Robert A. How to Conduct Surveys, Follow-up Studies, and Basic Data Collection in Evaluation Studies. Univ. of America Pr, 1981.
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