Pliocene and Pleistocene

Chicago citation style
Maryland Geological Survey, 1896-. Pliocene and Pleistocene. 1906. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/001663878. (Accessed November 14, 2018.)
APA citation style
Maryland Geological Survey, 1896-, (1906) Pliocene and Pleistocene. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/001663878
MLA citation style
Maryland Geological Survey, 1896-. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/001663878>.
Note: These citations are programmatically generated and may be incomplete.