APA (7th ed.) Citation

Roaf, M., Roaf, M., & Lanfranchi, G. (2003). The Median Dark Age.

Chicago Style (17th ed.) Citation

Roaf, Michael, M. Roaf, and G.B Lanfranchi. The Median Dark Age. 2003.

MLA (8th ed.) Citation

Roaf, Michael, et al. The Median Dark Age. 2003.