Citazione Stile APA (7a Edizione)

Wills, G. (1994). Certain trumpets: The call of leaders. Simon & Schuster.

Citazione stile Chigago Style (17a edizione)

Wills, Garry. Certain Trumpets: The Call of Leaders. New York: Simon & Schuster, 1994.

Citatione MLA (9a ed.)

Wills, Garry. Certain Trumpets: The Call of Leaders. Simon & Schuster, 1994.