ニューヨークライフビル
focus.nps.gov/docs/NHLS/Photos/78001876.pdf New York Life Building--Accompanying 5 photos, exterior and interior, from 1976, by George R. Adams. (PDF, 1.20 MB) National Register of Historic Places Inventory-Nomination]”. National Park Service (1977年2月). 2013年1月6日閲覧。
↑ Mendelsohn, Joyce. Touring the Flatiron. New York: New York Landmarks Conservancy, 1998. ISBN 0-964-7061-2-1
↑ Siwolop, Sana "Big Spaces Are Opening Up In Madison Square Park Area" The New York Times (March 24, 2004)
参考文献
The WPA Guide to New York City 1939, reprinted 1982 ISBN 0-394-71215-3