APA (7th ed.) Citation

Guelzo, A. C., Gallagher, G. W., & Allitt, P. (2008). The history of the United States (2nd ed.). Teaching Co..

Chicago Style (17th ed.) Citation

Guelzo, Allen C., Gary W. Gallagher, and Patrick Allitt. The History of the United States. 2nd ed. Chantilly, VA: Teaching Co., 2008.

MLA (9th ed.) Citation

Guelzo, Allen C., et al. The History of the United States. 2nd ed. Teaching Co., 2008.