APA (7th ed.) Citation

Mash, E. J., Barkley, R. A., & Barkley, R. A. (1996). Child psychopathology. Guilford Press.

Chicago Style (17th ed.) Citation

Mash, Eric J., Russell A. Barkley, and Russell A. Barkley. Child Psychopathology. New York [u.a.]: Guilford Press, 1996.

MLA (8th ed.) Citation

Mash, Eric J., et al. Child Psychopathology. Guilford Press, 1996.