Cita APA (7a ed.)

Winchell, C. M. (1951). Guide to reference books (7th ed.). American Library Association.

Cita Chicago Style (17a ed.)

Winchell, Constance M. Guide to Reference Books. 7th ed. Chicago: American Library Association, 1951.

Cita MLA (9a ed.)

Winchell, Constance M. Guide to Reference Books. 7th ed. American Library Association, 1951.