APA (7th ed.) Citation

Plato. (1974). The republic (2nd ed (revised).). Penguin Books.

Chicago Style (17th ed.) Citation

Plato. The Republic. 2nd ed (revised). Middlesex, England: Penguin Books, 1974.

MLA (9th ed.) Citation

Plato. The Republic. 2nd ed (revised). Penguin Books, 1974.

Warning: These citations may not always be 100% accurate.