APA (7th ed.) Citation

Ammianus Marcellinus, Hamilton, W., & Wallace-Hadrill, A. (1986). The later Roman empire (A.D. 354-378). Penguin Books.

Chicago Style (17th ed.) Citation

Ammianus Marcellinus, Walter Hamilton, and Andrew Wallace-Hadrill. The Later Roman Empire (A.D. 354-378). Harmondsworth, Middlesex, England ; New York: Penguin Books, 1986.

MLA (9th ed.) Citation

Ammianus Marcellinus, et al. The Later Roman Empire (A.D. 354-378). Penguin Books, 1986.