MLA

Company, Black Hills Placer Mining. The Black Hills Placer Mining Co., Dakota ... 0AD. https://collections.library.yale.edu/catalog/17369310.

APA, 6th edition

Company, B. H. P. M. (0 C.E.). The Black Hills Placer Mining Co., Dakota ... [Literature]. https://collections.library.yale.edu/catalog/17369310.