APA (7th ed.) Citation

Seiders, V. M. (1971). Cretaceous and lower Tertiary stratigraphy of the Gurabo and El Yunque quadrangles, Puerto Rico: A description of the largely marine-deposited volcaniclastic rocks and subordinate lava flows and pelagic mudstones that underlie this part of eastern Puerto Rico. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Seiders, Victor M. Cretaceous and Lower Tertiary Stratigraphy of the Gurabo and El Yunque Quadrangles, Puerto Rico: A Description of the Largely Marine-deposited Volcaniclastic Rocks and Subordinate Lava Flows and Pelagic Mudstones That Underlie This Part of Eastern Puerto Rico. [Washington, D.C.]: United States Department of the Interior, Geological Survey, 1971.

MLA (9th ed.) Citation

Seiders, Victor M. Cretaceous and Lower Tertiary Stratigraphy of the Gurabo and El Yunque Quadrangles, Puerto Rico: A Description of the Largely Marine-deposited Volcaniclastic Rocks and Subordinate Lava Flows and Pelagic Mudstones That Underlie This Part of Eastern Puerto Rico. United States Department of the Interior, Geological Survey, 1971.