APA (7th ed.) Citation

Posidonius, Edelstein, L., & Kidd, I. G. (1989). Posidonius (2nd ed.). Cambridge University Press.

Chicago Style (17th ed.) Citation

Posidonius, Ludwig Edelstein, and I. G. Kidd. Posidonius. 2nd ed. Cambridge ; New York: Cambridge University Press, 1989.

MLA (8th ed.) Citation

Posidonius, et al. Posidonius. 2nd ed. Cambridge University Press, 1989.