Ledec, G., & Goodland, R. J. A. (1988). Wildlands: Their protection and management in economic development. World Bank.
Lua i Stíl Chicago (17ú heag.)Ledec, George, agus Robert J. A. Goodland. Wildlands: Their Protection and Management in Economic Development. Washington, DC: World Bank, 1988.
Lua MLA (8ú heag.)Ledec, George, agus Robert J. A. Goodland. Wildlands: Their Protection and Management in Economic Development. World Bank, 1988.
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