APA (7th ed.) Citation

Hall, W. E., & Higgins, A. (1917). A treatise on international law. Oxford University Press.

Chicago Style (17th ed.) Citation

Hall, William Edward, and A.Pearce Higgins. A Treatise on International Law. London: Oxford University Press, 1917.

MLA (9th ed.) Citation

Hall, William Edward, and A.Pearce Higgins. A Treatise on International Law. Oxford University Press, 1917.