APA (7th ed.) Citation

Lamar, J. E., Armon, W. J., & Simon, J. A. (1956). Illinois oil shales.

Chicago Style (17th ed.) Citation

Lamar, J. E., William J. Armon, and J. A. Simon. Illinois Oil Shales. Urbana, Ill, 1956.

MLA (9th ed.) Citation

Lamar, J. E., et al. Illinois Oil Shales. 1956.