APA (7th ed.) Citation

Cobbs Hoffman, E., & Blum, E. J. (2017). Major problems in American history (Fourth edition.). Cengage Learning.

Chicago Style (17th ed.) Citation

Cobbs Hoffman, Elizabeth, and Edward J. Blum. Major Problems in American History. Fourth edition. Boston, MA: Cengage Learning, 2017.

MLA (9th ed.) Citation

Cobbs Hoffman, Elizabeth, and Edward J. Blum. Major Problems in American History. Fourth edition. Cengage Learning, 2017.