APA (7th ed.) Citation

Blackwelder, B. W. (1981). Late Cenozoic stages and molluscan zones of the U. S. Middle Atlantic coastal plain. The Paleontological Society, Inc..

Chicago Style (17th ed.) Citation

Blackwelder, Blake W. Late Cenozoic Stages and Molluscan Zones of the U. S. Middle Atlantic Coastal Plain. [Tulsa]: The Paleontological Society, Inc., 1981.

MLA (9th ed.) Citation

Blackwelder, Blake W. Late Cenozoic Stages and Molluscan Zones of the U. S. Middle Atlantic Coastal Plain. The Paleontological Society, Inc., 1981.