Cita APA (7th ed.)

Liebert, R. M., Wicks-Nelson, R., & Marmor, G. S. (1977). Developmental psychology (2d ed.). Prentice-Hall.

Cita Chicago (17th ed.)

Liebert, Robert M., Rita Wicks-Nelson, i Gloria Strauss Marmor. Developmental Psychology. 2d ed. Englewood Cliffs, N.J.: Prentice-Hall, 1977.

Cita MLA (8th ed.)

Liebert, Robert M., et al. Developmental Psychology. 2d ed. Prentice-Hall, 1977.