APA (7th ed.) Citation

Nelson, A. E. (1966). Cretaceous and Tertiary rocks in the Corozal quadrangle, northern Puerto Rico. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Nelson, Arthur E. Cretaceous and Tertiary Rocks in the Corozal Quadrangle, Northern Puerto Rico. [Washington, D.C.]: United States Department of the Interior, Geological Survey, 1966.

MLA (9th ed.) Citation

Nelson, Arthur E. Cretaceous and Tertiary Rocks in the Corozal Quadrangle, Northern Puerto Rico. United States Department of the Interior, Geological Survey, 1966.