APA (7th ed.) Citation

Blatchley, W. S., & Weller, S. (1906). The petroleum industry of southeastern Illinois. University of Illinois.

Chicago Style (17th ed.) Citation

Blatchley, W. S., and Stuart Weller. The Petroleum Industry of Southeastern Illinois. Urbana: University of Illinois, 1906.

MLA (9th ed.) Citation

Blatchley, W. S., and Stuart Weller. The Petroleum Industry of Southeastern Illinois. University of Illinois, 1906.

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