Drew, C. J. (1976). Introduction to designing research and evaluation. C. V. Mosby.
Cita Chicago Style (17a ed.)Drew, Clifford J. Introduction to Designing Research and Evaluation. Saint Louis: C. V. Mosby, 1976.
Cita MLA (9a ed.)Drew, Clifford J. Introduction to Designing Research and Evaluation. C. V. Mosby, 1976.
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