APA Style
Folmer, H., Ierland, E, V, (, V. (1989).
Valuation methods and policy making in environmental economics .
ne:
Elsevier.
MLA Style
Folmer, Henk., Ierland, E., Van, (Ekko, Van).
"Valuation methods and policy making in environmental economics".
ne:
Elsevier,
1989.
Computer File.