Centro Vasco de Arquitectura
Euskal Herriko Arkitektura Ikerkundea
http://www.voysey.gotik-romanik.de/Shaw,%20Thumbnails/Hampstead%20Towers,%206%20Ellerdale%20Road,%20Hampstead%20(1875).%20Built%20by%20and%20for%20Norman%20Shaw,%20photo%20by%20stevecadman%20on%20Flickr.jpg
https://upload.wikimedia.org/wikipedia/commons/thumb/4/4d/Shaw_6_Ellerdale_Road_2006.jpg/220px-Shaw_6_Ellerdale_Road_2006.jpg