APA (7th ed.) Citation

Sager, D. J. (1968). Reference: A programmed instruction. Ohio Library Foundation.

Chicago Style (17th ed.) Citation

Sager, Donald J. Reference: A Programmed Instruction. Columbus: Ohio Library Foundation, 1968.

MLA (9th ed.) Citation

Sager, Donald J. Reference: A Programmed Instruction. Ohio Library Foundation, 1968.