APA
McMahon G. j. a., . (1999). An environmental study of artisanal, small, and medium mining in Bolivia, Chile, and Peru. Washington, DC: World Bank.
Chicago
McMahon Gary jt author, . 1999. An environmental study of artisanal, small, and medium mining in Bolivia, Chile, and Peru. Washington, DC: World Bank.
Harvard
McMahon G. j. a., . (1999). An environmental study of artisanal, small, and medium mining in Bolivia, Chile, and Peru. Washington, DC: World Bank.
MLA
McMahon Gary jt author, . An environmental study of artisanal, small, and medium mining in Bolivia, Chile, and Peru. Washington, DC: World Bank. 1999.