Tohutoro APA (7th ed.)

Cofer, C. N. (1972). Programmed learning aid for introduction to psychology. Learning systems co..

Tohutoru Kātū Chicago (17th ed.)

Cofer, Charles N. Programmed Learning Aid for Introduction to Psychology. Illinois: Learning systems co., 1972.

Tohutoro MLA (9th ed.)

Cofer, Charles N. Programmed Learning Aid for Introduction to Psychology. Learning systems co., 1972.