Thoms D Cook. (1979). Quasi-experimentation: Design and analysis issues for field settings. Boston, Massachusetts: Houghton Mifflin.
Παραπομπή Chicago StyleThoms D Cook. Quasi-experimentation: Design and Analysis Issues for Field Settings. Boston, Massachusetts: Houghton Mifflin, 1979.
Παραπομπή MLAThoms D Cook. Quasi-experimentation: Design and Analysis Issues for Field Settings. Boston, Massachusetts: Houghton Mifflin, 1979.
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