hartwick, J. M. (1989). Non-Renewable resources extraction programs and markets. Harwood academic Pub.
Chicago-стиль цитированияhartwick, John M. Non-Renewable Resources Extraction Programs and Markets. Chur: Harwood academic Pub, 1989.
MLA-цитированиеhartwick, John M. Non-Renewable Resources Extraction Programs and Markets. Harwood academic Pub, 1989.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.