APA (7th ed.) Citation

Zempel, E. N., & Verkler, L. A. (1994). Book prices: Used and rare 1994. Spoon River Press.

Chicago Style (17th ed.) Citation

Zempel, Edward N., and Linda A. Verkler. Book Prices: Used and Rare 1994. Peoria, IL: Spoon River Press, 1994.

MLA (9th ed.) Citation

Zempel, Edward N., and Linda A. Verkler. Book Prices: Used and Rare 1994. Spoon River Press, 1994.