APA (7th ed.) Citation

Riddell, T., Shackelford, J. A., & Stamos, S. (1990). Economics: A tool for understanding society. Addison-Wesley Pub. Co.

Chicago Style (17th ed.) Citation

Riddell, Tom, Jean A. Shackelford, and Steve Stamos. Economics: A Tool for Understanding Society. Reading, Mass: Addison-Wesley Pub. Co, 1990.

MLA (9th ed.) Citation

Riddell, Tom, et al. Economics: A Tool for Understanding Society. Addison-Wesley Pub. Co, 1990.