Map of the South West railway system : Missouri Pacific Ry., Central Branch U.P.R.R., Missouri, Kansas & Texas Ry., Texas and Pacific Ry., St. Louis, Iron Mountn. and Southern Ry., International and Great Northern Ry. and their connections / Rand McNally
MLA
McNally, Rand, and Company. Map of the South West Railway System : Missouri Pacific Ry., Central Branch U.P.R.R., Missouri, Kansas & Texas Ry., Texas and Pacific Ry., St. Louis, Iron Mountn. and Southern Ry., International and Great Northern Ry. and Their Connections / Rand McNally. Missouri Pacific Railway, 0AD. https://collections.library.yale.edu/catalog/15603767.
APA, 6th edition
McNally, R., & C. (0 C.E.). Map of the South West railway system : Missouri Pacific Ry., Central Branch U.P.R.R., Missouri, Kansas & Texas Ry., Texas and Pacific Ry., St. Louis, Iron Mountn. and Southern Ry., International and Great Northern Ry. and their connections / Rand McNally [Maps]. Missouri Pacific Railway, https://collections.library.yale.edu/catalog/15603767.