Map of the Northern Pacific R.R., its connections and tributary country.
MLA
Company, National Railway Publication. Map of the Northern Pacific R.R., Its Connections and Tributary Country. National Railway Publication Co., 0AD. https://collections.library.yale.edu/catalog/15535382.
APA, 6th edition
Company, N. R. P. (0 C.E.). Map of the Northern Pacific R.R., its connections and tributary country. [Maps]. National Railway Publication Co., https://collections.library.yale.edu/catalog/15535382.