(2011). Higher ambition: How great leaders creat economic and social value. Boston: Harvard Business.
Chicago Style aipamenaHigher Ambition: How Great Leaders Creat Economic and Social Value. Boston: Harvard Business, 2011.
MLA aipamenaHigher Ambition: How Great Leaders Creat Economic and Social Value. Boston: Harvard Business, 2011.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.