Tohutoro APA (7th ed.)
Collier, R. O., & Elam, S. M. (1961). Research design and analysis.
Tohutoru Kātū Chicago (17th ed.)
Collier, Raymond O., me Stanley Munson Elam. Research Design and Analysis. 1961.
Tohutoro MLA (9th ed.)
Collier, Raymond O., me Stanley Munson Elam. Research Design and Analysis. 1961.
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