Frankel ,Joseph. (1979). International relations in a: Changing world. O.B.Pr..
Cita Chicago (17th ed.)Frankel ,Joseph. International Relations in a: Changing World. Oxford: O.B.Pr., 1979.
Cita MLA (9th ed.)Frankel ,Joseph. International Relations in a: Changing World. O.B.Pr., 1979.
Atenció: Aquestes cites poden no estar 100% correctes.