DRUCKER PETER F. (2001). ESSENTIAL DRUCKER: PRE-EMINENT MANAGEMENT..OUR TIME (NA.). Butterworth,Heinemann.
Chicago Style (17. basım) AtıfDRUCKER PETER F. ESSENTIAL DRUCKER: PRE-EMINENT MANAGEMENT..OUR TIME. NA. Great,Britain: Butterworth,Heinemann, 2001.
MLA (9th ed.) AtıfDRUCKER PETER F. ESSENTIAL DRUCKER: PRE-EMINENT MANAGEMENT..OUR TIME. NA. Butterworth,Heinemann, 2001.
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