Randall, A. (1987). Resource economics: An economic approach to natural resource and environmental policy (2nd ed.). John Willey & Sons.
Lua i Stíl Chicago (17ú heag.)Randall, Alan. Resource Economics: An Economic Approach to Natural Resource and Environmental Policy. 2nd ed. New York: John Willey & Sons, 1987.
Lua MLA (9ú heag.)Randall, Alan. Resource Economics: An Economic Approach to Natural Resource and Environmental Policy. 2nd ed. John Willey & Sons, 1987.
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