Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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