Berstein, D. A., & Roy, E. J. (1994). Psychology (3rd.ed.). Houghton Mifflin.
Cita Chicago (17th ed.)Berstein, Douglas A., i Edward J. Roy. Psychology. 3rd.ed. Geneva: Houghton Mifflin, 1994.
Cita MLA (9th ed.)Berstein, Douglas A., i Edward J. Roy. Psychology. 3rd.ed. Houghton Mifflin, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.