Cook, T. D., & Campbell, D. T. (1979). Quasi-experimentation: Design & analysis issues for field settings. Houghton Mifflin.
Citace podle Chicago (17th ed.)Cook, Thomas D., a Donald Thomas Campbell. Quasi-experimentation: Design & Analysis Issues for Field Settings. Boston: Houghton Mifflin, 1979.
Citace podle MLA (9th ed.)Cook, Thomas D., a Donald Thomas Campbell. Quasi-experimentation: Design & Analysis Issues for Field Settings. Houghton Mifflin, 1979.
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