Sprague, J. L.; Cunningham, J. J. (2013). "A Frank Sprague Triumph: The Electrification of Grand Central Terminal [History]". IEEE Power and Energy Magazine. 11 (1). Institute of Electrical and Electronics Engineers (IEEE): 58–76. doi:10.1109/mpe.2012.2222293. ISSN1540-7977. S2CID6729668.
"MTA Capital Program 2020–2024". mta.info. Metropolitan Transportation Authority. September 16, 2019. Archived from the original on January 6, 2021. Retrieved October 3, 2019.
Sprague, J. L.; Cunningham, J. J. (2013). "A Frank Sprague Triumph: The Electrification of Grand Central Terminal [History]". IEEE Power and Energy Magazine. 11 (1). Institute of Electrical and Electronics Engineers (IEEE): 58–76. doi:10.1109/mpe.2012.2222293. ISSN1540-7977. S2CID6729668.
"MTA Capital Program 2020–2024". mta.info. Metropolitan Transportation Authority. September 16, 2019. Archived from the original on January 6, 2021. Retrieved October 3, 2019.
Sprague, J. L.; Cunningham, J. J. (2013). "A Frank Sprague Triumph: The Electrification of Grand Central Terminal [History]". IEEE Power and Energy Magazine. 11 (1). Institute of Electrical and Electronics Engineers (IEEE): 58–76. doi:10.1109/mpe.2012.2222293. ISSN1540-7977. S2CID6729668.