APA (7th ed.) Citation

McGill-Warner Co, Great Northern Railway Company (U.S.), & Grindhem, M. J. (1938). Great Northern Railway map of the United States. McGill-Warner.

Chicago Style (17th ed.) Citation

McGill-Warner Co, Great Northern Railway Company (U.S.), and M. J. Grindhem. Great Northern Railway Map of the United States. St. Paul: McGill-Warner, 1938.

MLA (9th ed.) Citation

McGill-Warner Co, et al. Great Northern Railway Map of the United States. McGill-Warner, 1938.