APA (7th ed.) Citation

Hartley, R. E., & Williams, C. D. (1989). Confirmation learning theory. Lang.

Chicago Style (17th ed.) Citation

Hartley, Raymond E., and Carl D. Williams. Confirmation Learning Theory. New York u.a: Lang, 1989.

MLA (9th ed.) Citation

Hartley, Raymond E., and Carl D. Williams. Confirmation Learning Theory. Lang, 1989.