Dyfyniad APA
Clancy, T. (1991). The sum of all fears. Jack Ryan Enterprises, Ltd.
Dyfyniad Arddull Chicago
Clancy, Tom. The Sum of All Fears. New York: Jack Ryan Enterprises, Ltd, 1991.
Dyfyniad MLA
Clancy, Tom. The Sum of All Fears. Jack Ryan Enterprises, Ltd, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.