APA (7 ম সংস্করণ) উদ্ধৃতি

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

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

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

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

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