Cite

South Dakota highways.

MLA

Commission, South Dakota. State Highway. South Dakota Highways. South Dakota State Highway Commission, 0AD. https://collections.library.yale.edu/catalog/15814763.

APA, 6th edition

Commission, S. D. S. H. (0 C.E.). South Dakota highways. [Road maps]. South Dakota State Highway Commission, https://collections.library.yale.edu/catalog/15814763.