Gaya APA

Drucker, P, F. (2006). (PASCA) Classic Drucker : Essential Wisdom of Peter Drucker From The Pa (1). USA: Harvard Business School Press.

Gaya MLA

Drucker, Peter, F.. "(PASCA) Classic Drucker : Essential Wisdom of Peter Drucker From The Pa". 1 USA: Harvard Business School Press, 2006. .