APA (7th ed.) Citation

Hartley, J. (1972). Strategies for programmed instruction: An educational technology. Butterworths.

Chicago Style (17th ed.) Citation

Hartley, J. Strategies for Programmed Instruction: An Educational Technology. London: Butterworths, 1972.

MLA (9th ed.) Citation

Hartley, J. Strategies for Programmed Instruction: An Educational Technology. Butterworths, 1972.

Warning: These citations may not always be 100% accurate.