Wiersma, W. (1985). Research methods in education: An introduction (3rd ed., rev. print.). Allyn and Bacon.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWiersma, William. Research Methods in Education: An Introduction. 3rd ed., rev. print. Boston: Allyn and Bacon, 1985.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWiersma, William. Research Methods in Education: An Introduction. 3rd ed., rev. print. Allyn and Bacon, 1985.
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