Hobgood. National Building Museum exhibits expanding role in education. SanAntonio Business Journal. 2002-09-22 [2015-05-07]. (原始内容存档于2015-05-18). Teens
out in 1880, downtown was in the center of the city. Uptown was north of downtown in Cincinnati, but south of downtown in New Orleans and San Francisco
(原始内容存档于2015-11-16). Alcoba, Natalie. Toronto's 'Manhattanization': Downtown development growing at 'mind blowing' rate. National Post. 2014-08-27 [2015-06-28]