APA (7th ed.) Citation

Huff, F. A., & Changnon, S. A. (1963). Drought climatology of Illinois. [publisher not identified].

Chicago Style (17th ed.) Citation

Huff, Floyd A., and Stanley A. Changnon. Drought Climatology of Illinois. [Urbana]: [publisher not identified], 1963.

MLA (9th ed.) Citation

Huff, Floyd A., and Stanley A. Changnon. Drought Climatology of Illinois. [publisher not identified], 1963.