APA (7th ed.) Citation

Grob, G. N., Billias, G. A., & Grob, G. N. (1972). Historical interpretations. Free Press.

Chicago Style (17th ed.) Citation

Grob, Gerald N., George Athan Billias, and Gerald N. Grob. Historical Interpretations. New York: Free Press, 1972.

MLA (8th ed.) Citation

Grob, Gerald N., et al. Historical Interpretations. Free Press, 1972.