APA (7th ed.) Citation

Marshall, R. B. (1911). Results of spirit leveling in Illinois, 1909 and 1910. Department of the Interior, United States Geological Survey.

Chicago Style (17th ed.) Citation

Marshall, R. B. Results of Spirit Leveling in Illinois, 1909 and 1910. Washington, D.C.: Department of the Interior, United States Geological Survey, 1911.

MLA (8th ed.) Citation

Marshall, R. B. Results of Spirit Leveling in Illinois, 1909 and 1910. Department of the Interior, United States Geological Survey, 1911.

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