Não informado. (1919). Scientific Survey of Porto Rico and the Virgin Islands. New York Academy of Sciences.
Lua i Stíl Chicago (17ú heag.)Não informado. Scientific Survey of Porto Rico and the Virgin Islands. New York: New York Academy of Sciences, 1919.
Lua MLA (8ú heag.)Não informado. Scientific Survey of Porto Rico and the Virgin Islands. New York Academy of Sciences, 1919.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.