Παραπομπή APA

Diehl, D. (2003). How did they manage: Leadership secrets of history. Penguin book.

Παραπομπή Chicago Style

Diehl, Daniel. How Did They Manage: Leadership Secrets of History. New Delhi: Penguin book, 2003.

Παραπομπή MLA

Diehl, Daniel. How Did They Manage: Leadership Secrets of History. Penguin book, 2003.