Diehl, D. (2003). How did they manage: Leadership secrets of history. Penguin book.
Chicago-stil citatDiehl, Daniel. How Did They Manage: Leadership Secrets of History. New Delhi: Penguin book, 2003.
MLA-referensDiehl, Daniel. How Did They Manage: Leadership Secrets of History. Penguin book, 2003.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.