Tram 28: The Most Famous Way of Visiting Lisbon - The Lisbon Travel Guide - Updated 2021
Tram 28 Lisbon: The Complete Guide - LisbonGo
Lisbon map - Popular Carris tram stops including routes 28 and 15 (tramway, electrico, funicular cable car) showing Aerobus shuttle - Greater Lisbon public transport zones
Portugal: Touring Lisbon on Tram 28 - Routes and Trips
File:Tram 28E and 12E Lisbon 2011.png - Wikimedia Commons