Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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