Drucker, P. F. (1992). Managing for the future: The 1990s and beyond. Dutton.
Lua i Stíl Chicago (17ú heag.)Drucker, Peter Ferdinand. Managing for the Future: The 1990s and Beyond. New York: Dutton, 1992.
Lua MLA (9ú heag.)Drucker, Peter Ferdinand. Managing for the Future: The 1990s and Beyond. Dutton, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.