APA (7th ed.) Citation

Dion Casio, Cary, E., & Foster, H. B. (1954). Dio's Roman history. William Heinemann [etc.].

Chicago Style (17th ed.) Citation

Dion Casio, Earnest Cary, and Herbert Baldwin Foster. Dio's Roman History. London [etc.]: William Heinemann [etc.], 1954.

MLA (9th ed.) Citation

Dion Casio, et al. Dio's Roman History. William Heinemann [etc.], 1954.