APA-ийн эшлэл(7 дахь хэвлэлт)

Willingham, R. (1997). The people principle: A revolutionary redefinition of leadership. St. Martins press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Willingham, Ron. The People Principle: A Revolutionary Redefinition of Leadership. New York: St. Martins press, 1997.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Willingham, Ron. The People Principle: A Revolutionary Redefinition of Leadership. St. Martins press, 1997.