^Automobile Legal Association (ALA) Automobile Green Book, 1930–31 and 1931–32 editions, (Scarborough Motor Guide Co., Boston, 1930 and 1931). The 1930–31 edition shows New York state routes prior to the 1930 renumbering
^Thibodeau, William A. (1938). The ALA Green Book (1938–39 ed.). Automobile Legal Association.
^ abcdeAutomobile Blue Book. 1 (1927 ed.). Chicago: Automobile Blue Book, Inc. 1927. This edition shows U.S. Routes as they were first officially signed in 1927.
^Esso (1954). New York with Special Maps of Putnam–Rockland–Westchester Counties and Finger Lakes Region (Map). Cartography by General Drafting (1955–56 ed.).