APA (7th ed.) Citation

Briggs, R. P. (1968). Geologic map of the Arecibo quadrangle, Puerto Rico. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Briggs, Reginald P. Geologic Map of the Arecibo Quadrangle, Puerto Rico. Washington, D.C.: U.S. Geological Survey, 1968.

MLA (9th ed.) Citation

Briggs, Reginald P. Geologic Map of the Arecibo Quadrangle, Puerto Rico. U.S. Geological Survey, 1968.

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