APA (7th ed.) Citation

O.W. Gray & Son, Michigan Railroad Commission, & G.W. & C.B. Colton & Co. (1877). Railroad map of Michigan. O.W. Gray & Son.

Chicago Style (17th ed.) Citation

O.W. Gray & Son, Michigan Railroad Commission, and G.W. & C.B. Colton & Co. Railroad Map of Michigan. Philadelphia: O.W. Gray & Son, 1877.

MLA (9th ed.) Citation

O.W. Gray & Son, et al. Railroad Map of Michigan. O.W. Gray & Son, 1877.