Drucker, P. F. (1998). Adventures of a bystander. John Wiley.
Chicago Style aipamenaDrucker, Peter F. Adventures of a Bystander. New York: John Wiley, 1998.
MLA aipamenaDrucker, Peter F. Adventures of a Bystander. John Wiley, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.