APA (7th ed.) Citation

Riddell, Shackelford, & Stamos. (1987). Economics: A tool for understanding society (3rd ed.). Addison-Wesley Pub. Co.

Chicago Style (17th ed.) Citation

Riddell, Shackelford, and Stamos. Economics: A Tool for Understanding Society. 3rd ed. Reading, Mass: Addison-Wesley Pub. Co, 1987.

MLA (8th ed.) Citation

Riddell, et al. Economics: A Tool for Understanding Society. 3rd ed. Addison-Wesley Pub. Co, 1987.