Παραπομπή σε μορφή APA (7η εκδ.)

Dixon, J. A., & Sherman, P. B. (1991). Economics of protected areas: A new look at benefits and costs. Earthscan.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Dixon, John A., και Paul B. Sherman. Economics of Protected Areas: A New Look at Benefits and Costs. London: Earthscan, 1991.

Παραπομπή σε μορφή MLA (9th εκδ.)

Dixon, John A., και Paul B. Sherman. Economics of Protected Areas: A New Look at Benefits and Costs. Earthscan, 1991.