*Linder, Bernard (December 2008). "Sixth Avenue Subway Service Changes". New York Division Bulletin. Vol. 51, no. 12. Electric Railroaders' Association. pp. 2–4. Retrieved August 6, 2016.
*Linder, Bernard (December 2008). "Sixth Avenue Subway Service Changes". New York Division Bulletin. Vol. 51, no. 12. Electric Railroaders' Association. pp. 2–4. Retrieved August 6, 2016.