APA (7th ed.) Citation

Polybius & Paton, W. R. (1922). The histories. Harvard University Press.

Chicago Style (17th ed.) Citation

Polybius and William Roger Paton. The Histories. Cambridge, Mass: Harvard University Press, 1922.

MLA (9th ed.) Citation

Polybius and William Roger Paton. The Histories. Harvard University Press, 1922.