APA (7th ed.) Citation

Leahy, R. L. (2003). Cognitive therapy techniques: A practitioner's guide. Guilford Press.

Chicago Style (17th ed.) Citation

Leahy, Robert L. Cognitive Therapy Techniques: A Practitioner's Guide. New York: Guilford Press, 2003.

MLA (9th ed.) Citation

Leahy, Robert L. Cognitive Therapy Techniques: A Practitioner's Guide. Guilford Press, 2003.