Không rõ. (2012). Internation Conference GMS 2020: Balancing Economic Growth and Environmental Sustainability. NOTNXB.
Chicago-стиль цитированияKhông rõ. Internation Conference GMS 2020: Balancing Economic Growth and Environmental Sustainability. NOTNXB, 2012.
MLA-цитированиеKhông rõ. Internation Conference GMS 2020: Balancing Economic Growth and Environmental Sustainability. NOTNXB, 2012.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.