APA استشهاد

Barker, J. C. (2000). International law and International Relations: International relations for the 21st century.

استشهاد بنمط شيكاغو

Barker, J Craig. International Law and International Relations: International Relations for the 21st Century. London, Continuum, 2000.

MLA استشهاد

Barker, J Craig. International Law and International Relations: International Relations for the 21st Century. 2000.