APA aipamena

DRUCKER PETER F. (2001). ESSENTIAL DRUCKER: PRE-EMINENT MANAGEMENT..OUR TIME (NA.). Butterworth,Heinemann.

Chicago Style aipamena

DRUCKER PETER F. ESSENTIAL DRUCKER: PRE-EMINENT MANAGEMENT..OUR TIME. NA. Great,Britain: Butterworth,Heinemann, 2001.

MLA aipamena

DRUCKER PETER F. ESSENTIAL DRUCKER: PRE-EMINENT MANAGEMENT..OUR TIME. NA. Butterworth,Heinemann, 2001.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.