APA (7th ed.) Citation

Plato. (2007). The republic (Penguin Classics ed.). Penguin Books.

Chicago Style (17th ed.) Citation

Plato. The Republic. Penguin Classics ed. London: Penguin Books, 2007.

MLA (9th ed.) Citation

Plato. The Republic. Penguin Classics ed. Penguin Books, 2007.