APA (7th ed.) Citation

Walker, W. H., & Walton, W. C. (1961). Ground-water development in three areas of central Illinois. [publisher not identified].

Chicago Style (17th ed.) Citation

Walker, William Henry, and William Clarence Walton. Ground-water Development in Three Areas of Central Illinois. [Urbana]: [publisher not identified], 1961.

MLA (9th ed.) Citation

Walker, William Henry, and William Clarence Walton. Ground-water Development in Three Areas of Central Illinois. [publisher not identified], 1961.