APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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