McDonald, Paul; Carman, Emily; Hoyt, Eric; Drake, Philip (2019). Hollywood and the Law. London: Bloomsbury Publishing. ISBN9781838716196. Retrieved 9 January 2022.
Blair, John M.; Reeside, Arthur (1940). "Appendix I". Investigation of Concentration of Economic Power. Washington, D.C.: U.S. Government Printing Office. p. 59. Retrieved 9 January 2022.