Centro Vasco de Arquitectura
Euskal Herriko Arkitektura Ikerkundea
https://www.findagrave.com/memorial/80635306/william-jaird-levitt
https://www.pinterest.es/pin/182606959868749916/
http://histomil.com/viewtopic.php?t=3918&start=6690
http://www.nmidigital.com/william-levitt-sueno-la-casa-todos/
http://statemuseumpa.org/levittown/one/b.html
https://tvtropes.org/pmwiki/pmwiki.php/UsefulNotes/WilliamLevitt
https://www.gettyimages.fr/search/2/image?specificpeople=1113459
https://www.nytimes.com/2017/07/28/nyregion/william-levitt-trump-boy-scouts-speech.html
https://www.gettyimages.fr/search/2/image?sort=best&specificpeople=1113459