Wiersma, W. (1991). Research methods in education: An introduction (5. ed.). Allyn and Bacon.
Chicago Style (17th ed.) CitationWiersma, William. Research Methods in Education: An Introduction. 5. ed. Boston u.a: Allyn and Bacon, 1991.
MLA (9th ed.) CitationWiersma, William. Research Methods in Education: An Introduction. 5. ed. Allyn and Bacon, 1991.
Warning: These citations may not always be 100% accurate.