Dyfyniad APA

Clancy, T. (1991). The sum of all fears. HarperCollins Publishers.

Dyfyniad Arddull Chicago

Clancy, Tom. The Sum of All Fears. London: HarperCollins Publishers, 1991.

Dyfyniad MLA

Clancy, Tom. The Sum of All Fears. HarperCollins Publishers, 1991.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.