APA (7th ed.) Citation

Mudge, I. G. (1951). Guide to reference books (7th ed.). American Library Association.

Chicago Style (17th ed.) Citation

Mudge, Isadore Gilbert. Guide to Reference Books. 7th ed. Chicago: American Library Association, 1951.

MLA (9th ed.) Citation

Mudge, Isadore Gilbert. Guide to Reference Books. 7th ed. American Library Association, 1951.