Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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