APA

Birnie Patricia W, Boyle Alan E, . (1992). International law and the environment. Oxford: Clarendon Press.

Chicago

Birnie Patricia W, Boyle Alan E, . 1992. International law and the environment. Oxford: Clarendon Press.

Harvard

Birnie Patricia W, Boyle Alan E, . (1992). International law and the environment. Oxford: Clarendon Press.

MLA

Birnie Patricia W, Boyle Alan E, . International law and the environment. Oxford: Clarendon Press. 1992.