Cita APA

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

Citación estilo Chicago

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

Cita MLA

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