APA (7th ed.) Citation

Haley, J. E. (1957). Focus on the frontier. Shamrock Oil and Gas Corp..

Chicago Style (17th ed.) Citation

Haley, J. Evetts. Focus on the Frontier. Amarillo, Tex.: Shamrock Oil and Gas Corp., 1957.

MLA (9th ed.) Citation

Haley, J. Evetts. Focus on the Frontier. Shamrock Oil and Gas Corp., 1957.

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