Geological map of the state of Tennessee

Chicago citation style
Troost, Gerard, 1776-1850. Geological map of the state of Tennessee. 1839. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/4m90f6721. (Accessed July 20, 2018.)
APA citation style
Troost, Gerard, 1776-1850, (1839) Geological map of the state of Tennessee. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/4m90f6721
MLA citation style
Troost, Gerard, 1776-1850. Retrieved from the Digital Public Library of America <http://ark.digitalcommonwealth.org/ark:/50959/4m90f6721>.
Note: These citations are programmatically generated and may be incomplete.