Christensen, L. B. (2001). Experimental methodology (8th ed.). Allyn & Bacon.
Tohutoru Kātū Chicago (17th ed.)Christensen, Larry B. Experimental Methodology. 8th ed. Boston: Allyn & Bacon, 2001.
Tohutoro MLA (9th ed.)Christensen, Larry B. Experimental Methodology. 8th ed. Allyn & Bacon, 2001.
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