APA (7th ed.) Citation

JUDD, C. H. (1939). Educational psychology. Houghton Mifflin Co.

Chicago Style (17th ed.) Citation

JUDD, Charles H. Educational Psychology. Boston: Houghton Mifflin Co, 1939.

MLA (9th ed.) Citation

JUDD, Charles H. Educational Psychology. Houghton Mifflin Co, 1939.