Cita APA (7a ed.)

Sands, P. (1995). Principles of international environmental law. University Press.

Cita Chicago Style (17a ed.)

Sands, Philippe. Principles of International Environmental Law. Manchester [etc.]: University Press, 1995.

Cita MLA (9a ed.)

Sands, Philippe. Principles of International Environmental Law. University Press, 1995.