Bernstein, D. A., & Clarke-Stewart, . A. (1991). Psychology (2nd ed.). Houghton Mifflin.
Cita Chicago (17th ed.)Bernstein, Douglas A., i Alison Clarke-Stewart. Psychology. 2nd ed. Geneva: Houghton Mifflin, 1991.
Cita MLA (9th ed.)Bernstein, Douglas A., i Alison Clarke-Stewart. Psychology. 2nd ed. Houghton Mifflin, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.