MLA

Westerberg, Br. (Bror). New township and railroad map of Minnesota : compiled from the latest authentic sources / Br. Westerberg, engr.. BRBL_00559. 1878. https://collections.library.yale.edu/catalog/15814607.

APA, 6th edition

Westerberg, Br. (Bror). (["BRBL_00559"])(1878)[New township and railroad map of Minnesota : compiled from the latest authentic sources / Br. Westerberg, engr.]. https://collections.library.yale.edu/catalog/15814607.