Farkas, C. (1997). Maximum leadership 2000. New York: Orion Business.
Chicago Style aipamenaFarkas, Charles. Maximum Leadership 2000. New York: Orion Business, 1997.
MLA aipamenaFarkas, Charles. Maximum Leadership 2000. New York: Orion Business, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.