Cita APA (7th ed.)

DRUCKER PETER F. (2004). DAILY DRUCKER. HARPER BUSINESS.

Cita Chicago (17th ed.)

DRUCKER PETER F. DAILY DRUCKER. NEW YORK: HARPER BUSINESS, 2004.

Cita MLA (9th ed.)

DRUCKER PETER F. DAILY DRUCKER. HARPER BUSINESS, 2004.