Não informado. (1957). British Bulletin of Publications on Latin America, the Caribbean, Portugal and Spain. Hispanic and Luso-Brazilian Councils.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. British Bulletin of Publications on Latin America, the Caribbean, Portugal and Spain. London: Hispanic and Luso-Brazilian Councils, 1957.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. British Bulletin of Publications on Latin America, the Caribbean, Portugal and Spain. Hispanic and Luso-Brazilian Councils, 1957.
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