APA-referens (7:e uppl.)

Udell, J. G. (1978). The economics of the American newspaper. Hastings House.

Chicago-referens (17:e uppl.)

Udell, Jon G. The Economics of the American Newspaper. New York: Hastings House, 1978.

MLA-referens (8:e uppl.)

Udell, Jon G. The Economics of the American Newspaper. Hastings House, 1978.