APA-referens (7:e uppl.)
ebrary, Inc, Leonard, J. W., & Hardinge, B. C. (1991). Coal preparation (5th ed.). Society for Mining, Metallurgy, and Exploration.
Chicago-referens (17:e uppl.)
ebrary, Inc, Joseph W. Leonard, och Byron C. Hardinge. Coal Preparation. 5th ed. Littleton, Colo.: Society for Mining, Metallurgy, and Exploration, 1991.
MLA-referens (9:e uppl.)
ebrary, Inc, et al. Coal Preparation. 5th ed. Society for Mining, Metallurgy, and Exploration, 1991.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.