Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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