APA (7th ed.) Citation

Lawrence, T. J., & Winfield, P. H. (1923). The principles of international law (7th ed., rev.). D.C. Heath.

Chicago Style (17th ed.) Citation

Lawrence, T. J., and Percy Henry Winfield. The Principles of International Law. 7th ed., rev. Boston: D.C. Heath, 1923.

MLA (8th ed.) Citation

Lawrence, T. J., and Percy Henry Winfield. The Principles of International Law. 7th ed., rev. D.C. Heath, 1923.