APA (7th ed.) Citation

Liebert, R. M., & Poulos, R. W. (1977). Developmental psychology (4th ed.). Prentice-Hall.

Chicago Style (17th ed.) Citation

Liebert, Robert M., and Rita Wicks Poulos. Developmental Psychology. 4th ed. New Jersey: Prentice-Hall, 1977.

MLA (9th ed.) Citation

Liebert, Robert M., and Rita Wicks Poulos. Developmental Psychology. 4th ed. Prentice-Hall, 1977.