Cita APA

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

Citación estilo Chicago

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

Cita MLA

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