DRUCKER PETER F. (2000). EFFECTIVE EXECUTIVE. BUTTERWORTH-HEINEMANN.
Cita Chicago (17th ed.)DRUCKER PETER F. EFFECTIVE EXECUTIVE. OXFORD: BUTTERWORTH-HEINEMANN, 2000.
Cita MLA (9th ed.)DRUCKER PETER F. EFFECTIVE EXECUTIVE. BUTTERWORTH-HEINEMANN, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.