APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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