APA

Hart H L A,, . (1997). The concept of law. Oxford: Clarendon Press.

Chicago

Hart H L A,, . 1997. The concept of law. Oxford: Clarendon Press.

Harvard

Hart H L A,, . (1997). The concept of law. Oxford: Clarendon Press.

MLA

Hart H L A,, . The concept of law. Oxford: Clarendon Press. 1997.