Drucker, P. F. (1992). Managing for the future. Elsevier, Tuman Talley Books/Dutton.
Lua i Stíl Chicago (17ú heag.)Drucker, Peter F. Managing for the Future. New Delhi : New York: Elsevier, Tuman Talley Books/Dutton, 1992.
Lua MLA (8ú heag.)Drucker, Peter F. Managing for the Future. Elsevier, Tuman Talley Books/Dutton, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.