Dyfyniad APA

Roskin, M., & Berry, N. O. (1993). IR: The new world of international relations (2nd ed.). Prentice-Hall.

Dyfyniad Arddull Chicago

Roskin, Michael, and Nicholas O. Berry. IR: The New World of International Relations. 2nd ed. Englewood Cliffs, N.J.: Prentice-Hall, 1993.

Dyfyniad MLA

Roskin, Michael, and Nicholas O. Berry. IR: The New World of International Relations. 2nd ed. Prentice-Hall, 1993.

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