APA (7th ed.) Citation

Hirshberg, H. S. n. 1. (1942). Subject guide to reference books. American Library Association.

Chicago Style (17th ed.) Citation

Hirshberg, Herbert S. n. 1879. Subject Guide to Reference Books. Chicago: American Library Association, 1942.

MLA (9th ed.) Citation

Hirshberg, Herbert S. n. 1879. Subject Guide to Reference Books. American Library Association, 1942.