APA (7th ed.) Citation

Tobisch, O. T., & Turner, M. D. (1971). Geologic map of the San Sebastián quadrangle, Puerto Rico. The Survey.

Chicago Style (17th ed.) Citation

Tobisch, Othmar T., and Mort D. Turner. Geologic Map of the San Sebastián Quadrangle, Puerto Rico. Washington, D.C.: The Survey, 1971.

MLA (9th ed.) Citation

Tobisch, Othmar T., and Mort D. Turner. Geologic Map of the San Sebastián Quadrangle, Puerto Rico. The Survey, 1971.