Cita APA (7a ed.)
American Library Association. (1942). A.L.A. rules for filing catalog cards. A.L.A..
Cita Chicago Style (17a ed.)
American Library Association. A.L.A. Rules for Filing Catalog Cards. Chicago: A.L.A., 1942.
Cita MLA (9a ed.)
American Library Association. A.L.A. Rules for Filing Catalog Cards. A.L.A., 1942.
Precaución: Estas citas no son 100% exactas.