Hagemeijer, Tjerk, As Línguas de S. Tomé e Príncipe(PDF), Revista de Crioulos de Base Lexical Portuguesa e Espanhola 1 (1), 2009, 1 (1): 1–27 [2020-07-10], (原始内容存档(PDF)于2020-12-24)
Hagemeijer, Tjerk, As Línguas de S. Tomé e Príncipe(PDF), Revista de Crioulos de Base Lexical Portuguesa e Espanhola 1 (1), 2009, 1 (1): 1–27 [2020-07-10], (原始内容存档(PDF)于2020-12-24)
Bermuda. World InfoZone. [21 April 2010]. (原始内容存档于2021-05-07).