Dyfyniad APA

American Psychological Association & Cooper, H. M. (2012). APA handbook of research methods in psychology. American Psychological Association.

Dyfyniad Arddull Chicago

American Psychological Association and Harris M. Cooper. APA Handbook of Research Methods in Psychology. Washington, DC: American Psychological Association, 2012.

Dyfyniad MLA

American Psychological Association and Harris M. Cooper. APA Handbook of Research Methods in Psychology. American Psychological Association, 2012.

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