Cita APA (7th ed.)

Downs, R. B. (1974). Guide to Illinois library resources. Published in cooperation with the Illinois State Library Association by the American Library Association.

Cita Chicago (17th ed.)

Downs, Robert Bingham. Guide to Illinois Library Resources. Chicago: Published in cooperation with the Illinois State Library Association by the American Library Association, 1974.

Cita MLA (9th ed.)

Downs, Robert Bingham. Guide to Illinois Library Resources. Published in cooperation with the Illinois State Library Association by the American Library Association, 1974.