APA
Dixon J., Sherman P., . (1990). Economics Of Protected Areas : A New Look At Benefits And Co. : Earthscan Publications Ltd. London/East-West Cent.
Chicago
Dixon JA, Sherman PB, . 1990. Economics Of Protected Areas : A New Look At Benefits And Co. : Earthscan Publications Ltd. London/East-West Cent.
Harvard
Dixon J., Sherman P., . (1990). Economics Of Protected Areas : A New Look At Benefits And Co. : Earthscan Publications Ltd. London/East-West Cent.
MLA
Dixon JA, Sherman PB, . Economics Of Protected Areas : A New Look At Benefits And Co. : Earthscan Publications Ltd. London/East-West Cent. 1990.