Cita APA (7a ed.)

Butler, W. E. (1987). International law and the international system: [papers originated in the I Anglo-Soviet Symposium on Public International Law held at University College London on 25-27 April 1986]. Nijhoff.

Cita Chicago Style (17a ed.)

Butler, William Elliott. International Law and the International System: [papers Originated in the I Anglo-Soviet Symposium on Public International Law Held at University College London on 25-27 April 1986]. Dordrecht [etc.]: Nijhoff, 1987.

Cita MLA (9a ed.)

Butler, William Elliott. International Law and the International System: [papers Originated in the I Anglo-Soviet Symposium on Public International Law Held at University College London on 25-27 April 1986]. Nijhoff, 1987.