Dyfyniad APA

Ellis, R. S. (1930). The psychology of individual differences. D. Appleton and Co.

Dyfyniad Arddull Chicago

Ellis, Robert Sidney. The Psychology of Individual Differences. New York: D. Appleton and Co, 1930.

Dyfyniad MLA

Ellis, Robert Sidney. The Psychology of Individual Differences. D. Appleton and Co, 1930.

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