APA (7th ed.) Citation

Marathon Oil Company. (1987). One hundred years on the frontier. Marathon Oil Company.

Chicago Style (17th ed.) Citation

Marathon Oil Company. One Hundred Years on the Frontier. Findlay, Ohio: Marathon Oil Company, 1987.

MLA (9th ed.) Citation

Marathon Oil Company. One Hundred Years on the Frontier. Marathon Oil Company, 1987.

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