APA (7th ed.) Citation

Downey, M. T., Green, H., Katzman, D. M., Markowitz, R. J., & Moyer, A. E. (1992). The twentieth century. Macmillan Publishing Company.

Chicago Style (17th ed.) Citation

Downey, Matthew T., Harvey Green, David M. Katzman, Ruth Jacknow Markowitz, and Albert E. Moyer. The Twentieth Century. New York: Macmillan Publishing Company, 1992.

MLA (9th ed.) Citation

Downey, Matthew T., et al. The Twentieth Century. Macmillan Publishing Company, 1992.