APA (7th ed.) Citation

Kraus, R., Zack, J. S., & Stricker, G. (2004). Online counseling: A handbook for mental health professionals. Elsevier Academic Press.

Chicago Style (17th ed.) Citation

Kraus, Ron, Jason S. Zack, and George Stricker. Online Counseling: A Handbook for Mental Health Professionals. Amsterdam [etc.]: Elsevier Academic Press, 2004.

MLA (9th ed.) Citation

Kraus, Ron, et al. Online Counseling: A Handbook for Mental Health Professionals. Elsevier Academic Press, 2004.