Tobisch, O. T., & Turner, M. D. (1971). Geologic map of the San Sebastián quadrangle, Puerto Rico. The Survey.
Chicago Style (17th ed.) CitationTobisch, Othmar T., and Mort D. Turner. Geologic Map of the San Sebastián Quadrangle, Puerto Rico. Washington, D.C.: The Survey, 1971.
MLA (9th ed.) CitationTobisch, Othmar T., and Mort D. Turner. Geologic Map of the San Sebastián Quadrangle, Puerto Rico. The Survey, 1971.
Warning: These citations may not always be 100% accurate.