(1991). Coal preparation (5th ed.). Society for Mining, Metallurgy, and Exploration.
芝加哥风格引文Coal Preparation. 5th ed. Littleton, Colo: Society for Mining, Metallurgy, and Exploration, 1991.
MLA引文Coal Preparation. 5th ed. Society for Mining, Metallurgy, and Exploration, 1991.
警告：这些引文格式不一定是100％准确.