Udell, J. G. (1978). The economics of the American newspaper. Hastings House.
芝加哥风格引文Udell, Jon G. The Economics of the American Newspaper. New York: Hastings House, 1978.
MLA引文Udell, Jon G. The Economics of the American Newspaper. Hastings House, 1978.
警告：这些引文格式不一定是100％准确.