Cita APA (7th ed.)
Clancy, T. (1991). The sum of all fears. Jack Ryan Enterprises, Ltd.
Cita Chicago (17th ed.)
Clancy, Tom. The Sum of All Fears. New York: Jack Ryan Enterprises, Ltd, 1991.
Cita MLA (9th ed.)
Clancy, Tom. The Sum of All Fears. Jack Ryan Enterprises, Ltd, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.