APA (7th ed.) Zitazioa

Drucker, P. F. (1989). The New Realities. Harper $ Row.

Chicago Style (17th ed.) Zitazioa

Drucker, Peter F. The New Realities. New York: Harper $ Row, 1989.

MLA (9th ed.) Zitazioa

Drucker, Peter F. The New Realities. Harper $ Row, 1989.