Diehl, D. (2003). How did they manage: Leadership secrets of history. Penguin book.
استشهاد بنمط شيكاغوDiehl, Daniel. How Did They Manage: Leadership Secrets of History. New Delhi: Penguin book, 2003.
MLA استشهادDiehl, Daniel. How Did They Manage: Leadership Secrets of History. Penguin book, 2003.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.