-. (1988). Selected environmental law statutes: 1988-1989 educational edition. West Pub.
Dyfyniad Arddull Chicago-. Selected Environmental Law Statutes: 1988-1989 Educational Edition. St. Paul: West Pub, 1988.
Dyfyniad MLA-. Selected Environmental Law Statutes: 1988-1989 Educational Edition. West Pub, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.