Posner, M. J. (1982). Executive essentials. New York: Avon Books.
Trích dẫn kiểu ChicagoPosner, Mitchell J. Executive Essentials. New York: Avon Books, 1982.
ציטוט MLAPosner, Mitchell J. Executive Essentials. New York: Avon Books, 1982.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.