APA (7th ed.) Citation

Rand McNally and Company. (1940). Washington-Oregon Union Oil Road map. Rand McNally and Company [for] Union Oil Company.

Chicago Style (17th ed.) Citation

Rand McNally and Company. Washington-Oregon Union Oil Road Map. [Chicago, Ill.]: Rand McNally and Company [for] Union Oil Company, 1940.

MLA (8th ed.) Citation

Rand McNally and Company. Washington-Oregon Union Oil Road Map. Rand McNally and Company [for] Union Oil Company, 1940.

Warning: These citations may not always be 100% accurate.