Cita APA

Hartmann, G. W. (1941). Educational psychology. American Book Company.

Citación estilo Chicago

Hartmann, George Wilfried. Educational Psychology. New York, Cincinnati: American Book Company, 1941.

Cita MLA

Hartmann, George Wilfried. Educational Psychology. American Book Company, 1941.

Warning: These citations may not always be 100% accurate.