Drucker, P. F., & Drucker, P. F. (1998). Peter Drucker on the profession of management. Harvard Business School Press.
Lua i Stíl Chicago (17ú heag.)Drucker, Peter F., agus Peter F. Drucker. Peter Drucker on the Profession of Management. Boston, Mass.: Harvard Business School Press, 1998.
Lua MLA (8ú heag.)Drucker, Peter F., agus Peter F. Drucker. Peter Drucker on the Profession of Management. Harvard Business School Press, 1998.
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