Dyfyniad APA
Thornton, J., & Beckwith, S. (1976). Environmental law. Sweet & Maxwell..
Dyfyniad Arddull Chicago
Thornton, Justine, and Silas Beckwith. Environmental Law. London: Sweet & Maxwell., 1976.
Dyfyniad MLA
Thornton, Justine, and Silas Beckwith. Environmental Law. Sweet & Maxwell., 1976.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.