Cite

Official map of South Dakota / issued by the Department of Immigration and Statistics.

MLA

Official Map of South Dakota / Issued by the Department of Immigration and Statistics. Department of Immigration and Statistics?, 1889. https://collections.library.yale.edu/catalog/15814742.

APA, 6th edition

Official map of South Dakota / issued by the Department of Immigration and Statistics. (1889). [Maps]. Department of Immigration and Statistics?, https://collections.library.yale.edu/catalog/15814742.