Dyfyniad APA

O'Connor, K., & Sabato, L. (1993). American government: Roots and reform (Special pre-election preview ed., Special preview ed.). Macmillan Maxwell Macmillan Canada.

Dyfyniad Arddull Chicago

O'Connor, Karen, and Larry Sabato. American Government: Roots and Reform. Special pre-election preview ed., Special preview ed. New York, Toronto: Macmillan Maxwell Macmillan Canada, 1993.

Dyfyniad MLA

O'Connor, Karen, and Larry Sabato. American Government: Roots and Reform. Special pre-election preview ed., Special preview ed. Macmillan Maxwell Macmillan Canada, 1993.

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