Cita APA (7a ed.)
Drucker, P. F. (2007). The effective executive. Elsevier Butterworth-Heinemann.
Cita Chicago Style (17a ed.)
Drucker, Peter F. The Effective Executive. Oxford: Elsevier Butterworth-Heinemann, 2007.
Cita MLA (9a ed.)
Drucker, Peter F. The Effective Executive. Elsevier Butterworth-Heinemann, 2007.
Precaución: Estas citas no son 100% exactas.