Nie, Norman H.; Miller, Darwin W., III; Golde, Saar; Butler, Daniel M.; Winneg, Kenneth (2010). "The World Wide Web and the U.S. Political News Market". American Journal of Political Science (dalam bahasa Inggris). 54 (2): 428–439. doi:10.1111/j.1540-5907.2010.00439.x. ISSN1540-5907.
Nie, Norman H.; Miller, Darwin W., III; Golde, Saar; Butler, Daniel M.; Winneg, Kenneth (2010). "The World Wide Web and the U.S. Political News Market". American Journal of Political Science (dalam bahasa Inggris). 54 (2): 428–439. doi:10.1111/j.1540-5907.2010.00439.x. ISSN1540-5907.