APA (7th ed.) Citation

Howard, R. H. (1961). Oil and gas in the Adams-Brown-Schuyler County area, Illinois. [publisher not identified].

Chicago Style (17th ed.) Citation

Howard, Richard Henry. Oil and Gas in the Adams-Brown-Schuyler County Area, Illinois. Urbana: [publisher not identified], 1961.

MLA (9th ed.) Citation

Howard, Richard Henry. Oil and Gas in the Adams-Brown-Schuyler County Area, Illinois. [publisher not identified], 1961.