APA Edition Citation

Liebert, R. M., Marmour, G. S., & Poulos, R. W. (1977). Developmental psychology (2.). Prentice - Hall Inc.

Chicago Edition Citation

Liebert, R M., G S. Marmour, and R W. Poulos. Developmental Psychology. 2. New Jersey: Prentice - Hall Inc, 1977.

MLA Edition Citation

Liebert, R M., et al. Developmental Psychology. 2. Prentice - Hall Inc, 1977.