Aruuda, Ligia, author
Porto Editora, 2004
Buku Teks
Gomes, Alvaro
orto Editora, 2002
Buku Teks
Voinova, N., author
Enciclopedia Sovietica, 1964
Buku Referensi
Tavares, Ana, author
Lidel, 2004
Buku Teks
Whitlam, John, author
Harper Collins, 2001
Buku Referensi