Smith, R. A., & Davis, S. F. (2003). The psychologist as detective: An introduction to conducting research in psychology (3rd ed.). Upper Saddle River, New Jersey.

Smith, Randolph A., and Stephen F. Davis. The Psychologist As Detective: An Introduction to Conducting Research in Psychology. 3rd ed. Upper Saddle River, New Jersey, 2003.

Smith, Randolph A., and Stephen F. Davis. The Psychologist As Detective: An Introduction to Conducting Research in Psychology. 3rd ed. Upper Saddle River, New Jersey, 2003.