. (1973). SME mining engineering handbook Volume 1 (Sumb dari Ir. Rachman Wiriasudarma). The American Institute of Mining, Metallurgical, and Petroleum Engineers.
Lua i Stíl Chicago (17ú heag.)SME Mining Engineering Handbook Volume 1 (Sumb Dari Ir. Rachman Wiriasudarma). The American Institute of Mining, Metallurgical, and Petroleum Engineers, 1973.
Lua MLA (8ú heag.)SME Mining Engineering Handbook Volume 1 (Sumb Dari Ir. Rachman Wiriasudarma). The American Institute of Mining, Metallurgical, and Petroleum Engineers, 1973.
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