Drucker, P. F. (1982). The Changing World Of The Executive Peter F. Drucker. A Truman Talley.
Lua i Stíl Chicago (17ú heag.)Drucker, Peter F. The Changing World Of The Executive Peter F. Drucker. A Truman Talley, 1982.
Lua MLA (8ú heag.)Drucker, Peter F. The Changing World Of The Executive Peter F. Drucker. A Truman Talley, 1982.
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