APA (7th ed.) Citation

Briggs, R. P. (1964). Provisional geologic map of Puerto Rico and adjacent islands. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Briggs, Reginald P. Provisional Geologic Map of Puerto Rico and Adjacent Islands. Washington, D.C.: U.S. Geological Survey, 1964.

MLA (9th ed.) Citation

Briggs, Reginald P. Provisional Geologic Map of Puerto Rico and Adjacent Islands. U.S. Geological Survey, 1964.

Warning: These citations may not always be 100% accurate.