Centro Vasco de Arquitectura
Euskal Herriko Arkitektura Ikerkundea
http://www.abebooks.co.uk/servlet/BookDetailsPL?bi=14305861325&searchurl=tn=introducci%F3n%20a%20la%20arquitectura%20del%20siglo%20xx&sortby=20&an=peel%20lucy%20powell%20polly%20garrett%20alexander
http://www.abebooks.co.uk/servlet/BookDetailsPL?bi=12071561323&searchurl=tn=introducci%F3n%20a%20la%20arquitectura%20del%20siglo%20xx&sortby=20&an=peel%20lucy%20powell%20polly%20garrett%20alexander