Gaya APA

Smith, V, K., Kopp, R. (1993). Valuing natural assets : the economics of natural resource damage assessment / Editor, Raymond J. Kopp, V.Kerry Smith . : Resources For The Future.

Gaya MLA

Smith, V., Kerry., Kopp, Raymond. "Valuing natural assets : the economics of natural resource damage assessment / Editor, Raymond J. Kopp, V.Kerry Smith". : Resources For The Future, 1993. Textbook.