Cita APA (7th ed.)

Sands, P. (2003). Principles of international environmental law (2a. ed.). Cambridge University.

Cita Chicago (17th ed.)

Sands, Philippe. Principles of International Environmental Law. 2a. ed. Cambridge: Cambridge University, 2003.

Cita MLA (9th ed.)

Sands, Philippe. Principles of International Environmental Law. 2a. ed. Cambridge University, 2003.