APA (7th ed.) Citation

Mangold, G. B. (1924). Problems of child welfare (Rev. ed.). Macmillan.

Chicago Style (17th ed.) Citation

Mangold, George Benjamin. Problems of Child Welfare. Rev. ed. New York: Macmillan, 1924.

MLA (9th ed.) Citation

Mangold, George Benjamin. Problems of Child Welfare. Rev. ed. Macmillan, 1924.