APA (7th ed.) Citation

Stern, M. R., Gross, S. L., & Cowley, M. (1968). The Twentieth century (Rev. and expanded.). Viking Press.

Chicago Style (17th ed.) Citation

Stern, Milton R., Seymour Lee Gross, and Malcolm Cowley. The Twentieth Century. Rev. and expanded. New York: Viking Press, 1968.

MLA (8th ed.) Citation

Stern, Milton R., et al. The Twentieth Century. Rev. and expanded. Viking Press, 1968.