Map of Frazer's River, gold regions, on the north west coast / compiled from government surveys by Charles H. Swan, Boston.
MLA
Swan, Charles H. Map of Frazer's River, Gold Regions, on the North West Coast / Compiled from Government Surveys by Charles H. Swan, Boston. A. Williams & Co., 1858. https://collections.library.yale.edu/catalog/15536307.
APA, 6th edition
Swan, C. H. (1858). Map of Frazer's River, gold regions, on the north west coast / compiled from government surveys by Charles H. Swan, Boston. [Maps]. A. Williams & Co., https://collections.library.yale.edu/catalog/15536307.