APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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