APA (7th ed.) Citation

Kross, J., Allison, R. J., & Prokopowicz, G. J. (1997). American eras. Gale Research.

Chicago Style (17th ed.) Citation

Kross, Jessica, Robert J. Allison, and Gerald J. Prokopowicz. American Eras. Detroit: Gale Research, 1997.

MLA (9th ed.) Citation

Kross, Jessica, et al. American Eras. Gale Research, 1997.