Diehl, D. (2003). How did they manage: Leadership secrets of history. Penguin book.
Chicago-стиль цитированияDiehl, Daniel. How Did They Manage: Leadership Secrets of History. New Delhi: Penguin book, 2003.
MLA-цитированиеDiehl, Daniel. How Did They Manage: Leadership Secrets of History. Penguin book, 2003.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.