Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

Sands, Philippe. Principles of International Environmental Law. 2nd ed. Cambridge, Eng: Cambridge University Press, 2003.

Cita MLA (9th ed.)

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