United States. Department of Commerce and Labor. (1904). List of lights, buoys, and daymarks in 3rd Light-House subdistrict, embracing coasts, harbors, and waters of island of Porto Rico and adjacent islands of U.S., corrected to Nov. 1, 1904. GPO.
Chicago Style (17th ed.) CitationUnited States. Department of Commerce and Labor. List of Lights, Buoys, and Daymarks in 3rd Light-House Subdistrict, Embracing Coasts, Harbors, and Waters of Island of Porto Rico and Adjacent Islands of U.S., Corrected to Nov. 1, 1904. [Washington]: GPO, 1904.
MLA (9th ed.) CitationUnited States. Department of Commerce and Labor. List of Lights, Buoys, and Daymarks in 3rd Light-House Subdistrict, Embracing Coasts, Harbors, and Waters of Island of Porto Rico and Adjacent Islands of U.S., Corrected to Nov. 1, 1904. GPO, 1904.