Hart, H. L. A. (1997). The concept of law. Oxford: Oxford University Press.
Trích dẫn kiểu ChicagoHart, H L A. The Concept of Law. Oxford: Oxford University Press, 1997.
MLA引文Hart, H L A. The Concept of Law. Oxford: Oxford University Press, 1997.
警告：這些引文格式不一定是100％准確.