MLA

of Commerce, United States. Department, and Labor. Bureau of Statistics. Principal Transportation Routes of the World. Department of Commerce and Labor, Bureau of Statistics, 0AD. https://collections.library.yale.edu/catalog/16664842.

APA, 6th edition

of Commerce, U. S. D., & of Statistics, L. B. (0 C.E.). Principal transportation routes of the world. [Annotations (Provenance)--20th century, World maps]. Department of Commerce and Labor, Bureau of Statistics, https://collections.library.yale.edu/catalog/16664842.