APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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