APA (7th ed.) Citation

Chamot, A. U., DeMado, J., & Hollie, S. (2008). Keystone (Texas ed.). Pearson Longman.

Chicago Style (17th ed.) Citation

Chamot, Anna Uhl, John DeMado, and Sharroky Hollie. Keystone. Texas ed. White Plains, NY: Pearson Longman, 2008.

MLA (9th ed.) Citation

Chamot, Anna Uhl, et al. Keystone. Texas ed. Pearson Longman, 2008.