Ray, W. J. (2000). Methods toward a science of behavior and experience (6th ed.). Wadsworth.
Chicago-viite (17. p.)Ray, William J. Methods Toward a Science of Behavior and Experience. 6th ed. Belmont, CA: Wadsworth, 2000.
MLA-viite (9. p.)Ray, William J. Methods Toward a Science of Behavior and Experience. 6th ed. Wadsworth, 2000.
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