APA (7th ed.) Citation

ScienceDirect (Online service), Bellack, A. S., & Hersen, M. (1998). Comprehensive clinical psychology. Pergamon.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), Alan S. Bellack, and Michel Hersen. Comprehensive Clinical Psychology. Amsterdam ; New York: Pergamon, 1998.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. Comprehensive Clinical Psychology. Pergamon, 1998.