Cita APA (7th ed.)

Sands, P. (2003). Principles of international environmental law (Second edition.). Cambridge University Press.

Cita Chicago (17th ed.)

Sands, Philippe. Principles of International Environmental Law. Second edition. Cambridge ; New York: Cambridge University Press, 2003.

Cita MLA (8th ed.)

Sands, Philippe. Principles of International Environmental Law. Second edition. Cambridge University Press, 2003.