APA (7th ed.) Citation

Glover, L., Pease, M. H., Jr., & Arnow, T. (1977). Surficial geologic map of the Playa de Ponce and Santa Isabel quadrangles, Puerto Rico. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Glover, Lynn, Maurice H. Pease, Jr, and Ted Arnow. Surficial Geologic Map of the Playa De Ponce and Santa Isabel Quadrangles, Puerto Rico. Reston, Va.: U.S. Geological Survey, 1977.

MLA (9th ed.) Citation

Glover, Lynn, et al. Surficial Geologic Map of the Playa De Ponce and Santa Isabel Quadrangles, Puerto Rico. U.S. Geological Survey, 1977.