APA (7th ed.) Citation

Foltz, C. I. (1961). The world of teaching machines: Programmed learning and self-instructional devices. Teaching research and technology division, Electronic teaching laboratories.

Chicago Style (17th ed.) Citation

Foltz, Charles I. The World of Teaching Machines: Programmed Learning and Self-instructional Devices. Washington: Teaching research and technology division, Electronic teaching laboratories, 1961.

MLA (9th ed.) Citation

Foltz, Charles I. The World of Teaching Machines: Programmed Learning and Self-instructional Devices. Teaching research and technology division, Electronic teaching laboratories, 1961.