Gaya APA

Drucker, P, F. (2004). The Daily Drucker : 366 Days of Insight and Motivation for Getting the Right Things Done (Cet. 1). New York: HarperCollins Publishers, Inc..

Gaya MLA

Drucker, Peter, F.. "The Daily Drucker : 366 Days of Insight and Motivation for Getting the Right Things Done". Cet. 1 New York: HarperCollins Publishers, Inc., 2004. Text.