APA (7th ed.) Zitazioa
Clancy, T. (1991). The sum of all fears. Jack Ryan Enterprises, Ltd.
Chicago Style (17th ed.) Zitazioa
Clancy, Tom. The Sum of All Fears. New York: Jack Ryan Enterprises, Ltd, 1991.
MLA (9th ed.) Zitazioa
Clancy, Tom. The Sum of All Fears. Jack Ryan Enterprises, Ltd, 1991.
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