Drucker, P. F. (2002). IThe effective executive. HarperBusiness.
Chicago Style (17th ed.) CitationDrucker, Peter F. IThe Effective Executive. New York: HarperBusiness, 2002.
MLA (9th ed.) CitationDrucker, Peter F. IThe Effective Executive. HarperBusiness, 2002.
Warning: These citations may not always be 100% accurate.