APA-referens (7:e uppl.)

Hughes, J. R. T. (1986). The vital few: The entrepreneur and American economic progress (Expanded ed.). Oxford University Press.

Chicago-referens (17:e uppl.)

Hughes, Jonathan R. T. The Vital Few: The Entrepreneur and American Economic Progress. Expanded ed. New York: Oxford University Press, 1986.

MLA-referens (9:e uppl.)

Hughes, Jonathan R. T. The Vital Few: The Entrepreneur and American Economic Progress. Expanded ed. Oxford University Press, 1986.