Cite

Northwestern United States / compiled and drawn in the Cartographic Division of the National Geographic Society for the National Geographic Magazine.

MLA

National Geographic Society (U.S.). Cartographic Division. Northwestern United States / compiled and drawn in the Cartographic Division of the National Geographic Society for the National Geographic Magazine.. BRBL_00620. 1960. https://collections.library.yale.edu/catalog/15821561.

APA, 6th edition

National Geographic Society (U.S.). Cartographic Division. (["BRBL_00620"])(1960)[Northwestern United States / compiled and drawn in the Cartographic Division of the National Geographic Society for the National Geographic Magazine.]. https://collections.library.yale.edu/catalog/15821561.