APA
Kopp R. J. (., Smith V. (., . (1993). Valuing natural assets: The economics of natural resource da. Baltimore: John Hopkins.
Chicago
Kopp Raymond J (ed), Smith V.Kerry (ed), . 1993. Valuing natural assets: The economics of natural resource da. Baltimore: John Hopkins.
Harvard
Kopp R. J. (., Smith V. (., . (1993). Valuing natural assets: The economics of natural resource da. Baltimore: John Hopkins.
MLA
Kopp Raymond J (ed), Smith V.Kerry (ed), . Valuing natural assets: The economics of natural resource da. Baltimore: John Hopkins. 1993.