APA (7th ed.) Citation

Geological Survey (U.S.). (1951). Topographic map of the Island of Vieques, Puerto Rico (Ed. of 1951.). The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). Topographic Map of the Island of Vieques, Puerto Rico. Ed. of 1951. Washington, D.C.: The Survey, 1951.

MLA (9th ed.) Citation

Geological Survey (U.S.). Topographic Map of the Island of Vieques, Puerto Rico. Ed. of 1951. The Survey, 1951.