APA (7th ed.) Citation

Mangold, G. B. (1936). Problems of child welfare (3rd ed.). Macmillan.

Chicago Style (17th ed.) Citation

Mangold, George Benjamin. Problems of Child Welfare. 3rd ed. New York: Macmillan, 1936.

MLA (9th ed.) Citation

Mangold, George Benjamin. Problems of Child Welfare. 3rd ed. Macmillan, 1936.