APA (7th ed.) Citation

Cofer, C. N. (1975). Programmed learning aid for human memory and forgetting. Learning Systems.

Chicago Style (17th ed.) Citation

Cofer, Charles Norval. Programmed Learning Aid for Human Memory and Forgetting. Homewood, Ill: Learning Systems, 1975.

MLA (9th ed.) Citation

Cofer, Charles Norval. Programmed Learning Aid for Human Memory and Forgetting. Learning Systems, 1975.