APA (7th ed.) Citation

Klein, R., & Wellek, R. (1989). Sample selection, aging, and reactivity of coal. J. Wiley.

Chicago Style (17th ed.) Citation

Klein, Ralph, and Robert Wellek. Sample Selection, Aging, and Reactivity of Coal. New York: J. Wiley, 1989.

MLA (9th ed.) Citation

Klein, Ralph, and Robert Wellek. Sample Selection, Aging, and Reactivity of Coal. J. Wiley, 1989.

Warning: These citations may not always be 100% accurate.