Drucker, P. F. (1974). Management: Tasks responsibilities practices. Harper & row.
Lua i Stíl Chicago (17ú heag.)Drucker, Peter F. Management: Tasks Responsibilities Practices. New York: Harper & row, 1974.
Lua MLA (9ú heag.)Drucker, Peter F. Management: Tasks Responsibilities Practices. Harper & row, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.