Smyrna, Kent County, Delaware.
MLA
Company, Sanborn Map. Smyrna, Kent County, Delaware. Sanborn Map Company, 0AD. https://collections.library.yale.edu/catalog/16387377.
APA, 6th edition
Company, S. M. (0 C.E.). Smyrna, Kent County, Delaware. [Cadastral maps, Fire insurance maps]. Sanborn Map Company, https://collections.library.yale.edu/catalog/16387377.