Tiket Pertandingan, Calo Tiket, Simbiosis Parasitisme bagi Suporter

Ammon, R Jr. dan A. L. Mulrooney. 1997. An Analysis Of Ticket Scalping Practices In Professional Sports. The Society for the Study of the Legal Aspects of Sport and Physical Activity, 7(3), 1997, 181-187.

Daniel, S. 2011. Ticket Scalping: Advocating For The Event Organiser. Australian and New Zealand Sports Law Journal, 2011 6(1), 87-117.

https://www.collegian.psu.edu/opinion/editorials/editorial-a-change-to-penn-state-football-ticket-process-could-prevent-astronomical-prices-from-scalpers/article_19296e78-eb4e-11eb-9262-3fc7dfc0a593.html