APA (7th ed.) Citation

American Library Association. (1968). ALA rules for filing catalog cards (2nd ed.). American Library Association.

Chicago Style (17th ed.) Citation

American Library Association. ALA Rules for Filing Catalog Cards. 2nd ed. Chicago: American Library Association, 1968.

MLA (9th ed.) Citation

American Library Association. ALA Rules for Filing Catalog Cards. 2nd ed. American Library Association, 1968.

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