APA (7th ed.) Citation

Meyer, R. F., & De Witt, W., Jr. (1990). Definition and world resources of natural bitumens. Dept. of the Interior, U.S. Geological Survey,.

Chicago Style (17th ed.) Citation

Meyer, R. F., and Wallace De Witt, Jr. Definition and World Resources of Natural Bitumens. [Reston, Va.]: Dept. of the Interior, U.S. Geological Survey,, 1990.

MLA (9th ed.) Citation

Meyer, R. F., and Wallace De Witt, Jr. Definition and World Resources of Natural Bitumens. Dept. of the Interior, U.S. Geological Survey,, 1990.