APA (7th ed.) Citation

Ward, P. E., Hoffard, S. H., & Davis, D. A. (1965). Hydrology of Guam. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Ward, Porter E., S. H. Hoffard, and Dan A. Davis. Hydrology of Guam. Washington: United States Department of the Interior, Geological Survey, 1965.

MLA (9th ed.) Citation

Ward, Porter E., et al. Hydrology of Guam. United States Department of the Interior, Geological Survey, 1965.