Lua APA (7ú heag.)

Douglas, O. B., & Holland, B. F. (1938). Fundamentals of educational psychology. Macmillan.

Lua i Stíl Chicago (17ú heag.)

Douglas, Oscar Berry, agus Benjamin Frank Holland. Fundamentals of Educational Psychology. New York: Macmillan, 1938.

Lua MLA (8ú heag.)

Douglas, Oscar Berry, agus Benjamin Frank Holland. Fundamentals of Educational Psychology. Macmillan, 1938.

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