United Nations Environment Programme / Industry and Environment Office. (1991). Environmental Aspects of Selected Non-ferrous Metals (Cu, Ni, Pb, Zn, Au) Ore Mining: -- A Technical Guide --. UNEP.
Цитирование в стиле Чикаго (17-е изд.)United Nations Environment Programme / Industry and Environment Office. Environmental Aspects of Selected Non-ferrous Metals (Cu, Ni, Pb, Zn, Au) Ore Mining: -- A Technical Guide --. Paris: UNEP, 1991.
Цитирование MLA (8-е изд.)United Nations Environment Programme / Industry and Environment Office. Environmental Aspects of Selected Non-ferrous Metals (Cu, Ni, Pb, Zn, Au) Ore Mining: -- A Technical Guide --. UNEP, 1991.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.