Cita APA (7th ed.)

Sheehy, E. P. (1968). Guide to reference books (8th ed.). American Library Association.

Cita Chicago (17th ed.)

Sheehy, Eugene P. Guide to Reference Books. 8th ed. Chicago: American Library Association, 1968.

Cita MLA (9th ed.)

Sheehy, Eugene P. Guide to Reference Books. 8th ed. American Library Association, 1968.