APA استشهاد

Tunkin, G. I., & Butler, W. E. (1974). Theory of International Law. Allen & Unwin.

استشهاد بنمط شيكاغو

Tunkin, G I., و William E. Butler. Theory of International Law. London: Allen & Unwin, 1974.

MLA استشهاد

Tunkin, G I., و William E. Butler. Theory of International Law. Allen & Unwin, 1974.