MLA

Map of Louisiana Representing the Several Land Districts : Prepared to Accompany the Surveyor General's Report. Surveyor General's Office?, 1850. https://collections.library.yale.edu/catalog/15811453.

APA, 6th edition

Map of Louisiana representing the several land districts : prepared to accompany the Surveyor General's report. (1850). [Maps]. Surveyor General's Office?, https://collections.library.yale.edu/catalog/15811453.