APA (7th ed.) Citation

Posidonio & Kidd, I. G. (1988). Posidonius. University Press.

Chicago Style (17th ed.) Citation

Posidonio and I. G. Kidd. Posidonius. Cambridge: University Press, 1988.

MLA (9th ed.) Citation

Posidonio and I. G. Kidd. Posidonius. University Press, 1988.