Drucker, P. F. (1989). The New Realities. Harper $ Row.
Lua i Stíl Chicago (17ú heag.)Drucker, Peter F. The New Realities. New York: Harper $ Row, 1989.
Lua MLA (9ú heag.)Drucker, Peter F. The New Realities. Harper $ Row, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.