[en] Journey to Portugal · In Pursuit of Portugal's History and Culture Mariner Books
[en] Portugal - A Tale of Small Cities White & Associates
[en] Berlitz · Portugal Pocket Guide Berlitz
[en] [Gutenberg 47423] • Vine and Olive; Or, Young America in Spain and Portugal / A Story of Travel and Adventure Createspace Independent Publishing Platform
[en] Berlitz Pocket Guide Portugal Berlitz Travel
[es] Spain & Portugal's Best Trips Lonely Planet
[es] Lonely Planet Spain & Portugal’s Best Trips Lonely Planet
[en] Lonely Planet Best of Portugal Lonely Planet
[en] [Lonely Planet 01] • Portugal · 11th Edition 2019 Lonely Planet
[en] Moon Portugal Moon Travel
[en] Fodor's Portugal Fodor's
[en] Insight Guides Portugal Apa Productions
[en] [Lonely Planet Country Guide 01] • Lonely Planet Portugal Lonely Planet
[pt] Portugal Travel Guide Lonely Planet
[en] The Rough Guide to Portugal · 14th Edition Rough Guides
[en] The Rough Guide to Portugal · 15th Edition Rough Guides