APA

Gates A. I., . (1949). Educational psychology. New York: Macmillan Co.

Chicago

Gates Arthur Irving, . 1949. Educational psychology. New York: Macmillan Co.

Harvard

Gates A. I., . (1949). Educational psychology. New York: Macmillan Co.

MLA

Gates Arthur Irving, . Educational psychology. New York: Macmillan Co. 1949.