Cite

Colton's railroad & township map of Massachusetts, Rhode Island and Connecticut : with parts of Maine, New Hampshire, Vermont & New York.

MLA

G. W., et al. Colton's Railroad & Township Map of Massachusetts, Rhode Island and Connecticut : with Parts of Maine, New Hampshire, Vermont & New York. G.W. and C.B. Colton & Co., 1886. https://collections.library.yale.edu/catalog/15606960.

APA, 6th edition

G. W., Colton, C. B., & C. (1886). Colton's railroad & township map of Massachusetts, Rhode Island and Connecticut : with parts of Maine, New Hampshire, Vermont & New York. [Maps]. G.W. and C.B. Colton & Co., https://collections.library.yale.edu/catalog/15606960.