Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.