APA (7th ed.) Citation

Riddell, T., Shackelford, J. A., & Stamos, S. (1991). Economics: A tool for understanding society (4th ed.). Addison-Wesley Pub. Co.

Chicago Style (17th ed.) Citation

Riddell, Tom, Jean A. Shackelford, and Steve Stamos. Economics: A Tool for Understanding Society. 4th ed. Reading, Mass: Addison-Wesley Pub. Co, 1991.

MLA (9th ed.) Citation

Riddell, Tom, et al. Economics: A Tool for Understanding Society. 4th ed. Addison-Wesley Pub. Co, 1991.