APA-viite (7. p.)

Cram, D. (1961). Explaining "teaching machines" and programming. Fearon Pub.

Chicago-viite (17. p.)

Cram, David. Explaining "Teaching Machines" and Programming. San Francisco: Fearon Pub, 1961.

MLA-viite (9. p.)

Cram, David. Explaining "Teaching Machines" and Programming. Fearon Pub, 1961.