Cite

Map of Mexico / prepared especially for the National Geographic magazine, Gilbert H. Grosvenor, editor, by the Matthews-Northrup Works, Buffalo N.Y.

MLA

Works, Matthews-Northrup. Map of Mexico / Prepared Especially for the National Geographic Magazine, Gilbert H. Grosvenor, Editor, by the Matthews-Northrup Works, Buffalo N.Y. The National Geographic Society, 0AD. https://collections.library.yale.edu/catalog/15822295.

APA, 6th edition

Works, M.-N. (0 C.E.). Map of Mexico / prepared especially for the National Geographic magazine, Gilbert H. Grosvenor, editor, by the Matthews-Northrup Works, Buffalo N.Y. [Physical maps]. The National Geographic Society, https://collections.library.yale.edu/catalog/15822295.