Παραπομπή σε μορφή APA (7η εκδ.)

Environmental Policy in a Market Economy : Wageningen, Folmer, H., & Van Ierland, E. C. (1989). Valuation methods and policy making in environmental economics. Elsevier.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Environmental Policy in a Market Economy : Wageningen, Henk Folmer, και Ekko C. Van Ierland. Valuation Methods and Policy Making in Environmental Economics. Amsterdam: Elsevier, 1989.

Παραπομπή σε μορφή MLA (9th εκδ.)

Environmental Policy in a Market Economy : Wageningen, et al. Valuation Methods and Policy Making in Environmental Economics. Elsevier, 1989.