Willoughby, W. W. (1924). The fundamental concepts of public law. Macmillan.
芝加哥风格引文Willoughby, Westel Woodbury. The Fundamental Concepts of Public Law. New York: Macmillan, 1924.
MLA引文Willoughby, Westel Woodbury. The Fundamental Concepts of Public Law. Macmillan, 1924.
警告：这些引文格式不一定是100％准确.