Swain, O. (1940). Notes used on catalog cards: A list of examples. American Library Association.
Chicago-viite (17. p.)Swain, Olive. Notes Used on Catalog Cards: A List of Examples. Chicago: American Library Association, 1940.
MLA-viite (9. p.)Swain, Olive. Notes Used on Catalog Cards: A List of Examples. American Library Association, 1940.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.