APA (7th ed.) Citation

Lansdown, R., & Walker, M. G. (1991). Your child's development: From birth to adolescence. Alfred A. Knopf.

Chicago Style (17th ed.) Citation

Lansdown, Richard, and Marjorie G. Walker. Your Child's Development: From Birth to Adolescence. New York: Alfred A. Knopf, 1991.

MLA (9th ed.) Citation

Lansdown, Richard, and Marjorie G. Walker. Your Child's Development: From Birth to Adolescence. Alfred A. Knopf, 1991.