Cite

A geological map of the United States [cartographic material].

MLA

A Geological Map of the United States [Cartographic Material]. I.T. Hinton & Simpkin & Marshall, 0AD. https://collections.library.yale.edu/catalog/15825321.

APA, 6th edition

A geological map of the United States [cartographic material]. (0 C.E.). [Maps]. I.T. Hinton & Simpkin & Marshall, https://collections.library.yale.edu/catalog/15825321.