APA (7th ed.) Citation

McColvin, L. R. (1968). Public library services for children (3rd ed.). Unesco.

Chicago Style (17th ed.) Citation

McColvin, Lionel R. Public Library Services for Children. 3rd ed. Paris: Unesco, 1968.

MLA (9th ed.) Citation

McColvin, Lionel R. Public Library Services for Children. 3rd ed. Unesco, 1968.