Freedman, J. L., Carlsmith, J. M., & Sears, D. O. (1981). Social psychology (4th ed.). Prentice-Hall.
Cita Chicago (17th ed.)Freedman, Jonathan L., J. Merrill Carlsmith, i David O. Sears. Social Psychology. 4th ed. Englewood Cliffs, N.J: Prentice-Hall, 1981.
Cita MLA (9th ed.)Freedman, Jonathan L., et al. Social Psychology. 4th ed. Prentice-Hall, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.