APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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