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Scott, Charles (1978). "Design and Construction of the IRT: Civil Engineering"(PDF). Historic American Engineering Record. pp. 208–282 (PDF pp. 209–283). Archived(PDF) from the original on January 17, 2021. Retrieved December 20, 2020. This article incorporates text from this source, which is in the public domain.
"New York City's Subway Turns 100"(PDF). The Bulletin. 47 (10). Electric Railroaders' Association. October 2004. Archived from the original(PDF) on April 3, 2018. Retrieved April 2, 2018.
Herries, William (1916). Brooklyn Daily Eagle Almanac. Brooklyn Daily Eagle. p. 119. Archived from the original on May 11, 2021. Retrieved December 19, 2020.
Hood, Clifton (1978). "The Impact of the IRT in New York City"(PDF). Historic American Engineering Record. pp. 146–207 (PDF pp. 147–208). Archived(PDF) from the original on January 17, 2021. Retrieved December 20, 2020. This article incorporates text from this source, which is in the public domain.
Friedlander, Alex; Lonto, Arthur; Raudenbush, Henry (April 1960). "A Summary of Services on the IRT Division, NYCTA"(PDF). New York Division Bulletin. 3 (1). Electric Railroaders' Association: 2. Archived from the original(PDF) on September 14, 2020. Retrieved January 27, 2021.
Moore, Keith (June 10, 1988). "TA's skip-stop plan hit". New York Daily News. Archived from the original on November 8, 2018. Retrieved November 8, 2018.
Interborough Rapid Transit Company (1904). New York Subway: Its Construction and Equipment. Interborough Rapid Transit Company. Archived from the original on July 28, 2021. Retrieved December 23, 2020. This article incorporates text from this source, which is in the public domain.{{cite book}}: CS1 maint: postscript (link)
Schuyler, Montgomery (October 1905). "The New Bridges in New York City"(PDF). Architectural Record. 18 (4): 251. Archived(PDF) from the original on February 8, 2021. Retrieved January 5, 2021.
"125th Street Neighborhood Map". mta.info. Metropolitan Transportation Authority. April 2018. Archived from the original on December 20, 2021. Retrieved January 5, 2021.