APA (7th ed.) Zitazioa
(1993). Greening international law. Earthscan publications.
Chicago Style (17th ed.) Zitazioa
Greening International Law. UK: Earthscan publications, 1993.
MLA (9th ed.) Zitazioa
Greening International Law. Earthscan publications, 1993.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.