[외국도서] The 21 Indispensable Qualities of a Leader: Becoming the Person Others Will Want to Follow (Hardcover) - Becoming the Person Others Will Want to Follow
[외국도서] Winning with People: Discover the People Principles That Work for You Every Time (Paperback) - Discover the People Principles That Work for You Every Time
[외국도서] Building Leaders the West Point Way: Ten Principles from the Nation's Most Powerful Leadership Lab (Hardcover) - Ten Principles from the Nation's Most Powerful Leadership Lab