Hart, R. P. (1987). The sound of leadership: Presidential communication in the modern age. University of Chicago Press.
Chicago-referens (17:e uppl.)Hart, Roderick P. The Sound of Leadership: Presidential Communication in the Modern Age. Chicago: University of Chicago Press, 1987.
MLA-referens (9:e uppl.)Hart, Roderick P. The Sound of Leadership: Presidential Communication in the Modern Age. University of Chicago Press, 1987.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.