Campbell, D. T., & Stanley, J. C. (1963). Experimental and quasi-experimental designs for research. Chicago: Rand McNally College Publishing Company.
Παραπομπή Chicago StyleCampbell, Donald T., and Julian C. Stanley. Experimental and Quasi-experimental Designs for Research. Chicago: Rand McNally College Publishing Company, 1963.
Παραπομπή MLACampbell, Donald T., and Julian C. Stanley. Experimental and Quasi-experimental Designs for Research. Chicago: Rand McNally College Publishing Company, 1963.
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