APA (7th ed.) Citation

Bass, N. W., Horn, G. H., & Smith, H. L. (1970). Standards for the classification of public coal lands. U.S. Department of the Interior, [Geological Survey].

Chicago Style (17th ed.) Citation

Bass, N. Wood, George H. Horn, and H. L. Smith. Standards for the Classification of Public Coal Lands. [Washington, D.C.]: U.S. Department of the Interior, [Geological Survey], 1970.

MLA (9th ed.) Citation

Bass, N. Wood, et al. Standards for the Classification of Public Coal Lands. U.S. Department of the Interior, [Geological Survey], 1970.