Merkoša sitáhtat
APA-čujuhus (7. p.)
Cook, T. D., & Campbell, D. T. (1979). Quasi-experimentation: Design & analysis issues for field settings. Houghton Mifflin Company.
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Chicago-čujuhus (17. p.)
Cook, Thomas D., juo Donald T. Campbell. Quasi-experimentation: Design & Analysis Issues for Field Settings. Boston: Houghton Mifflin Company, 1979.
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MLA-čujuhus (9. p.)
Cook, Thomas D., juo Donald T. Campbell. Quasi-experimentation: Design & Analysis Issues for Field Settings. Houghton Mifflin Company, 1979.
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