Drucker, P. F. (1992). Managing for the future. Butterworth-Heinemann.
Lua i Stíl Chicago (17ú heag.)Drucker, Peter F. Managing for the Future. Oxford: Butterworth-Heinemann, 1992.
Lua MLA (9ú heag.)Drucker, Peter F. Managing for the Future. Butterworth-Heinemann, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.