Beatty, J., & Drucker, P. F. (1998). The world according to Peter Drucker. Universities Press.
Lua i Stíl Chicago (17ú heag.)Beatty, Jack, agus Peter F. Drucker. The World According to Peter Drucker. New York ; india: Universities Press, 1998.
Lua MLA (8ú heag.)Beatty, Jack, agus Peter F. Drucker. The World According to Peter Drucker. Universities Press, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.