APA aipamena

Hughes, D. (1996). Environmental law (ed. 3.). Butterworths.

Chicago Style aipamena

Hughes, David. Environmental Law. ed. 3. London: Butterworths, 1996.

MLA aipamena

Hughes, David. Environmental Law. ed. 3. Butterworths, 1996.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.