Centro Vasco de Arquitectura
Euskal Herriko Arkitektura Ikerkundea
INTERNET http://press.uchicago.edu/ucp/books/book/chicago/C/bo3644763.html
INTERNET http://www.betterworldbooks.com/the-chicago-tribune-tower-competition-id-0521590566.aspx
INTERNET http://www.amazon.com/Chicago-Tribune-Competition-Stanley-Tigerman/dp/0847804186
