Martins, Marco António Baptista
http://observare.ual.pt/janus.net/en/previous-issues/63-english-en/vol-1,-n-%C2%BA1-autumn-2010/bibliographic-review/104-noya-javier-2007-diplomacia-publica-para-el-siglo-xxi-la-gestion-de-la-imagen-exterior-y-la-opinion-publica-internacional-madrid-ariel-469-pp-en-gb-1.  , 2010