APA (7th ed.) Citation

Watkins, T. R., Lewellen, A., & Barrett, M. C. (2001). Dual diagnosis: An integrated approach to treatment. SAGE.

Chicago Style (17th ed.) Citation

Watkins, Ted R., Ara Lewellen, and Marjie Crow Barrett. Dual Diagnosis: An Integrated Approach to Treatment. Thousand Oaks, Calif. ; London: SAGE, 2001.

MLA (8th ed.) Citation

Watkins, Ted R., et al. Dual Diagnosis: An Integrated Approach to Treatment. SAGE, 2001.