APA

Sands P., Peel J., Fabra A. & MacKenzie R. (2012). Principles of international environmental law. Cambridge: Cambridge University Press.

Chicago

Sands Philippe, Peel Jacqueline, Fabra Adriana and MacKenzie Ruth. 2012. Principles of international environmental law. Cambridge: Cambridge University Press.

Harvard

Sands P., Peel J., Fabra A. and MacKenzie R. (2012). Principles of international environmental law. Cambridge: Cambridge University Press.

MLA

Sands Philippe, Peel Jacqueline, Fabra Adriana and MacKenzie Ruth. Principles of international environmental law. Cambridge: Cambridge University Press. 2012.