Campbell, D. T. (1979). Quasi-experimentation: Design r analysisiissues for field settings. Houghton Mifflin Company.
Chicago Style CitationCampbell, Donald T. Quasi-experimentation: Design R Analysisiissues for Field Settings. Houghton Mifflin Company, 1979.
MLA CitationCampbell, Donald T. Quasi-experimentation: Design R Analysisiissues for Field Settings. Houghton Mifflin Company, 1979.
Warning: These citations may not always be 100% accurate.