"Equitable Building". National Historic Landmark summary listing. National Park Service. September 12, 2007. Archived from the original on June 5, 2011. Retrieved September 13, 2007.
"Equitable Building". National Historic Landmark summary listing. National Park Service. September 12, 2007. Archived from the original on June 5, 2011. Retrieved September 13, 2007.
"Equitable Building". National Historic Landmark summary listing. National Park Service. September 12, 2007. Archived from the original on June 5, 2011. Retrieved September 13, 2007.