Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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