APA (7th ed.) Citation

Collingwood, D. M., Ekblaw, G. E., & Workman, L. Oil and gas possibilities of parts of Jersey, Greene, and Madison counties.

Chicago Style (17th ed.) Citation

Collingwood, Douglas Moore, George Elbert Ekblaw, and L.E Workman. Oil and Gas Possibilities of Parts of Jersey, Greene, and Madison Counties.

MLA (9th ed.) Citation

Collingwood, Douglas Moore, et al. Oil and Gas Possibilities of Parts of Jersey, Greene, and Madison Counties.