Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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