Isaac, S. (1971). Handbook in research and evaluation: A collection of principles, methods, and strategies useful in the planning, design, and evaluation of studies in education and the behavioral sciences. R. R. Knapp.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रIsaac, Stephen. Handbook in Research and Evaluation: A Collection of Principles, Methods, and Strategies Useful in the Planning, Design, and Evaluation of Studies in Education and the Behavioral Sciences. San Diego, Calif: R. R. Knapp, 1971.
एमएलए (9वां संस्करण) प्रशस्ति पत्रIsaac, Stephen. Handbook in Research and Evaluation: A Collection of Principles, Methods, and Strategies Useful in the Planning, Design, and Evaluation of Studies in Education and the Behavioral Sciences. R. R. Knapp, 1971.
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