History of Portugal. Cambridge University Archive. 1937. p. 349. GGKEY:XWSD821GE8S.
ipmuseus.pt
Instituto dos Museus e da Conservação (22 July 2011). "Palácio Nacional de Mafra". Museus e Palácios. Archived from the original on 11 May 2012. Retrieved 5 January 2013.
web.archive.org
Instituto dos Museus e da Conservação (22 July 2011). "Palácio Nacional de Mafra". Museus e Palácios. Archived from the original on 11 May 2012. Retrieved 5 January 2013.