Shadish, W. R., & Cook, T. D. (2002). Experimental and quasi-experimental designs for generalized causal inference. Belmont, CA: Wadsworth/Cengage Learning.
Chicago-tyylinen lähdeviittausShadish, William R., ja Thomas D. Cook. Experimental and Quasi-experimental Designs for Generalized Causal Inference. Belmont, CA: Wadsworth/Cengage Learning, 2002.
MLA-viiteShadish, William R., ja Thomas D. Cook. Experimental and Quasi-experimental Designs for Generalized Causal Inference. Belmont, CA: Wadsworth/Cengage Learning, 2002.
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