Kimball, Francis H. (May 1908). "City Investing Building". The New York Architect. Vol. 2, no. 5. Harwell-Evans Company. Archived from the original on April 24, 2022. Retrieved October 6, 2020.
Gabrielan, Randall (2007). Along Broadway. Postcard History Series. Arcadia Pub. p. 34. ISBN978-0-7385-5031-2. Archived from the original on April 24, 2022. Retrieved October 6, 2020.
King, Moses (1893). Kings Handbook of New York City. King's Handbook of New York City: An Outline History and Description of the American Metropolis ; with Over One Thousand Illustrations. Moses King. p. 130. Archived from the original on April 24, 2022. Retrieved October 6, 2020.
"Shadows Cast by Skyscrapers". Buildings and Building Management. Building Manager Publishing Company. November 1918. p. 38. Archived from the original on September 16, 2020. Retrieved May 11, 2020.
"Building Material and Equipment"(PDF). The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 86, no. 2215. August 27, 1910. pp. 346–347. Archived(PDF) from the original on October 9, 2020. Retrieved October 6, 2020 – via columbia.edu.
"Prospective Building". The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 77, no. 1980. February 24, 1906. p. 641. Archived from the original on October 9, 2020. Retrieved October 6, 2020 – via columbia.edu.
"Brief and Personal". The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 81, no. 2098. May 30, 1908. p. 1015. Archived from the original on April 24, 2022. Retrieved October 6, 2020 – via columbia.edu.
Engineering Record 1907, p. 268. "Volume 57". Engineering Record. Vol. 57. 1907. This article incorporates text from this source, which is in the public domain.
Engineering Record 1907, p. 267. "Volume 57". Engineering Record. Vol. 57. 1907. This article incorporates text from this source, which is in the public domain.
Engineering Record 1907, p. 696. "Volume 57". Engineering Record. Vol. 57. 1907. This article incorporates text from this source, which is in the public domain.
Engineering Record 1907, p. 269. "Volume 57". Engineering Record. Vol. 57. 1907. This article incorporates text from this source, which is in the public domain.
Engineering Record 1907, pp. 269–270. "Volume 57". Engineering Record. Vol. 57. 1907. This article incorporates text from this source, which is in the public domain.
Engineering Record 1907, pp. 267–268. "Volume 57". Engineering Record. Vol. 57. 1907. This article incorporates text from this source, which is in the public domain.
Engineering Record 1907, p. 270. "Volume 57". Engineering Record. Vol. 57. 1907. This article incorporates text from this source, which is in the public domain.
Engineering Record 1907, p. 697. "Volume 57". Engineering Record. Vol. 57. 1907. This article incorporates text from this source, which is in the public domain.
"Buildings as Big as a Town". New York Sun. June 28, 1908. p. 22. Archived from the original on February 28, 2022. Retrieved August 13, 2020 – via newspapers.com.
Kimball, Francis H. (May 1908). "City Investing Building". The New York Architect. Vol. 2, no. 5. Harwell-Evans Company. Archived from the original on April 24, 2022. Retrieved October 6, 2020.
Gabrielan, Randall (2007). Along Broadway. Postcard History Series. Arcadia Pub. p. 34. ISBN978-0-7385-5031-2. Archived from the original on April 24, 2022. Retrieved October 6, 2020.
"Building Material and Equipment"(PDF). The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 86, no. 2215. August 27, 1910. pp. 346–347. Archived(PDF) from the original on October 9, 2020. Retrieved October 6, 2020 – via columbia.edu.
"Buildings as Big as a Town". New York Sun. June 28, 1908. p. 22. Archived from the original on February 28, 2022. Retrieved August 13, 2020 – via newspapers.com.
"Prospective Building". The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 77, no. 1980. February 24, 1906. p. 641. Archived from the original on October 9, 2020. Retrieved October 6, 2020 – via columbia.edu.
King, Moses (1893). Kings Handbook of New York City. King's Handbook of New York City: An Outline History and Description of the American Metropolis ; with Over One Thousand Illustrations. Moses King. p. 130. Archived from the original on April 24, 2022. Retrieved October 6, 2020.
"Brief and Personal". The Real Estate Record: Real Estate Record and Builders' Guide. Vol. 81, no. 2098. May 30, 1908. p. 1015. Archived from the original on April 24, 2022. Retrieved October 6, 2020 – via columbia.edu.
"Shadows Cast by Skyscrapers". Buildings and Building Management. Building Manager Publishing Company. November 1918. p. 38. Archived from the original on September 16, 2020. Retrieved May 11, 2020.