APA (7th ed.) Citation

Esso Marketers. (1940). Esso War Map. o.A.

Chicago Style (17th ed.) Citation

Esso Marketers. Esso War Map. o.A: o.A, 1940.

MLA (8th ed.) Citation

Esso Marketers. Esso War Map. o.A, 1940.

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