APA aipamena

Hughes, D. (1992). Environmental Law (2nd ed.). Butterworths.

Chicago Style aipamena

Hughes, David. Environmental Law. 2nd ed. London: Butterworths, 1992.

MLA aipamena

Hughes, David. Environmental Law. 2nd ed. Butterworths, 1992.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.