Rand McNally and Company. (1940). Washington-Oregon Union Oil Road map. Rand McNally and Company [for] Union Oil Company.
Cita Chicago Style (17a ed.)Rand McNally and Company. Washington-Oregon Union Oil Road Map. [Chicago, Ill.]: Rand McNally and Company [for] Union Oil Company, 1940.
Cita MLA (8a ed.)Rand McNally and Company. Washington-Oregon Union Oil Road Map. Rand McNally and Company [for] Union Oil Company, 1940.
Precaución: Estas citas no son 100% exactas.