APA (7th ed.) Citation

Van Alstine, R. E., & Schruben, P. G. (1980). Fluorspar resources of Africa. Dept. of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Van Alstine, Ralph Erskine, and Paul G. Schruben. Fluorspar Resources of Africa. [Reston, Va.]: Dept. of the Interior, Geological Survey, 1980.

MLA (9th ed.) Citation

Van Alstine, Ralph Erskine, and Paul G. Schruben. Fluorspar Resources of Africa. Dept. of the Interior, Geological Survey, 1980.