APA (7th ed.) Citation

Guzmán-Ríos, S. (1988). Hydrology and water quality of the principal springs in Puerto Rico. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Guzmán-Ríos, Senén. Hydrology and Water Quality of the Principal Springs in Puerto Rico. San Juan, Puerto Rico: U.S. Geological Survey, 1988.

MLA (9th ed.) Citation

Guzmán-Ríos, Senén. Hydrology and Water Quality of the Principal Springs in Puerto Rico. U.S. Geological Survey, 1988.