Drucker, P. F. (1981). Toward The Next Economics And Other Essays Peter F. Drucker. Harper & Row.
Lua i Stíl Chicago (17ú heag.)Drucker, Peter F. Toward The Next Economics And Other Essays Peter F. Drucker. Harper & Row, 1981.
Lua MLA (8ú heag.)Drucker, Peter F. Toward The Next Economics And Other Essays Peter F. Drucker. Harper & Row, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.