APA (7th ed.) Citation

Stirling, J. D., & Hellewell, J. S. E. (1999). Psychopathology. Routledge.

Chicago Style (17th ed.) Citation

Stirling, John D., and Jonathan S. E. Hellewell. Psychopathology. London ; New York: Routledge, 1999.

MLA (9th ed.) Citation

Stirling, John D., and Jonathan S. E. Hellewell. Psychopathology. Routledge, 1999.