Cita APA (7th ed.)

COFER, C. N., FITZGERALD, H. E., & HERMANSON, R. H. (1975). Programed learning aid for human memory and forgetting. Richard D. Irwin.

Cita Chicago (17th ed.)

COFER, Charles N., Hiram E. FITZGERALD, i Roger H. HERMANSON. Programed Learning Aid for Human Memory and Forgetting. Homewood: Richard D. Irwin, 1975.

Cita MLA (9th ed.)

COFER, Charles N., et al. Programed Learning Aid for Human Memory and Forgetting. Richard D. Irwin, 1975.