Mason, J. Alden; Espinosa, Aurelio M. (1918). "Porto-Rican Folk-Lore. Décimas, Christmas Carols, Nursery Rhymes, and Other Songs". The Journal of American Folklore. 31 (121): 289–450. doi:10.2307/534783. JSTOR534783.
jstor.org
Mason, J. Alden; Espinosa, Aurelio M. (1918). "Porto-Rican Folk-Lore. Décimas, Christmas Carols, Nursery Rhymes, and Other Songs". The Journal of American Folklore. 31 (121): 289–450. doi:10.2307/534783. JSTOR534783.