Manning, G. (2009). The art of leadership. McGraw-Hill Irwin.
Trích dẫn kiểu ChicagoManning, George. The Art of Leadership. McGraw-Hill Irwin, 2009.
ציטוט MLAManning, George. The Art of Leadership. McGraw-Hill Irwin, 2009.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.