F. Drucker, P. (2017). The theory of the business. Boston, Massachusett: Harvard Business Review Press.
Chicago Style aipamenaF. Drucker, Peter. The Theory of the Business. Boston, Massachusett: Harvard Business Review Press, 2017.
MLA aipamenaF. Drucker, Peter. The Theory of the Business. Boston, Massachusett: Harvard Business Review Press, 2017.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.