APA (7th ed.) Citation

Monroe, W. H. (1980). Some tropical landforms of Puerto Rico. U.S. Dept. of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Monroe, Watson Hiner. Some Tropical Landforms of Puerto Rico. [Reston, Va.]: U.S. Dept. of the Interior, Geological Survey, 1980.

MLA (9th ed.) Citation

Monroe, Watson Hiner. Some Tropical Landforms of Puerto Rico. U.S. Dept. of the Interior, Geological Survey, 1980.