Drucker, P. F. (1985). THE EFFECTIVE EXECUTIVE. Perenial Library.
Chicago Style (17th ed.) CitationDrucker, Peter F. THE EFFECTIVE EXECUTIVE. Perenial Library, 1985.
MLA (8th ed.) CitationDrucker, Peter F. THE EFFECTIVE EXECUTIVE. Perenial Library, 1985.
Warning: These citations may not always be 100% accurate.