APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.