APA (7th ed.) Citation

United States. Shipping Board, Marsh, F., & Guppy, W. L. (1920). United States Shipping Board world map (1st edition, October, 1920.). U.S. Shipping Board, Emergency Fleet Corpoation, Division of Operations.

Chicago Style (17th ed.) Citation

United States. Shipping Board, Faith Marsh, and W. Lawson Guppy. United States Shipping Board World Map. 1st edition, October, 1920. [Washington, D.C.]: U.S. Shipping Board, Emergency Fleet Corpoation, Division of Operations, 1920.

MLA (9th ed.) Citation

United States. Shipping Board, et al. United States Shipping Board World Map. 1st edition, October, 1920. U.S. Shipping Board, Emergency Fleet Corpoation, Division of Operations, 1920.