Cita APA (7th ed.)

(1942). A.L.A. rules for filing catalog cards. American Library Association.

Cita Chicago (17th ed.)

A.L.A. Rules for Filing Catalog Cards. Chicago, Illinois: American Library Association, 1942.

Cita MLA (9th ed.)

A.L.A. Rules for Filing Catalog Cards. American Library Association, 1942.