Seiffert, S. G. (1988). How to conduct a mine feasibility study: Surface coal mines. Maclean Hunter.
Chicagoスタイル(17版)引用形式Seiffert, Sidney G. How to Conduct a Mine Feasibility Study: Surface Coal Mines. [S.l.]: Maclean Hunter, 1988.
MLA(9版)引用形式Seiffert, Sidney G. How to Conduct a Mine Feasibility Study: Surface Coal Mines. Maclean Hunter, 1988.
警告: この引用は必ずしも正確ではありません.