American Institute of Mining, Metallurgical, and Petroleum Engineers, & Hustrulid, W. (1982). Underground mining methods handbook. Society of Mining Engineers of The American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc..
Lua i Stíl Chicago (17ú heag.)American Institute of Mining, Metallurgical, and Petroleum Engineers, agus W.A Hustrulid. Underground Mining Methods Handbook. New York: Society of Mining Engineers of The American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc., 1982.
Lua MLA (9ú heag.)American Institute of Mining, Metallurgical, and Petroleum Engineers, agus W.A Hustrulid. Underground Mining Methods Handbook. Society of Mining Engineers of The American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc., 1982.