APA (7th ed.) Citation

Trahan, M., & Gray, P. (2007). Focus on psychology: A guide to mastering Peter Gray's Psychology (5th.ed.). Worth Publishers..

Chicago Style (17th ed.) Citation

Trahan, Mary, and Peter Gray. Focus on Psychology: A Guide to Mastering Peter Gray's Psychology. 5th.ed. New York: Worth Publishers., 2007.

MLA (9th ed.) Citation

Trahan, Mary, and Peter Gray. Focus on Psychology: A Guide to Mastering Peter Gray's Psychology. 5th.ed. Worth Publishers., 2007.