Friedman, F. (2003). Practical guide to environmental management (9th ed.). Washington, D.C.: Environmental Law Institute.
Chicago-stil citatFriedman, Frank. Practical Guide to Environmental Management. 9th ed. Washington, D.C.: Environmental Law Institute, 2003.
MLA-referensFriedman, Frank. Practical Guide to Environmental Management. 9th ed. Washington, D.C.: Environmental Law Institute, 2003.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.