APA

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

Chicago

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

Harvard

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

MLA

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