MLA

Geological Survey (U.S.). The gold and coal fields of Alaska, together with the principal steamer routes and trails.. BRBL_00635. 1898. https://collections.library.yale.edu/catalog/15821786.

APA, 6th edition

Geological Survey (U.S.). (["BRBL_00635"])(1898)[The gold and coal fields of Alaska, together with the principal steamer routes and trails.]. https://collections.library.yale.edu/catalog/15821786.