History of Portugal
Office of the Secretary of State for Information and Tourism, [date of publication not identified]
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Livermore, H.V.
A New history of Portugal
Cambridge University Press, 1969
 Buku Teks
Disney, A.R
A history of Portugal and the Portuguese empire
Cambridge University Press, 2009
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Jordan, R. Furneaux
A concise history of western architecture
Thames, [Date of publication not identified]
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Nussbaum, Arthur
A concise history of the law of nations
Macmillan, 1958
 Buku Teks