Cita APA (7a ed.)

Ellis, E. G., Esler, A., & Beers, B. F. (2005). The modern era. Prentice Hall.

Cita Chicago Style (17a ed.)

Ellis, Elisabeth Gaynor, Anthony Esler, y Burton F. Beers. The Modern Era. Upper Saddle River, NJ: Prentice Hall, 2005.

Cita MLA (9a ed.)

Ellis, Elisabeth Gaynor, et al. The Modern Era. Prentice Hall, 2005.