APA (7th ed.) Citation

Procopius Caesariensis 500-562 & Williamson, G. A. (2004). The secret history. Penguin.

Chicago Style (17th ed.) Citation

Procopius Caesariensis 500-562 and G. A. Williamson. The Secret History. London: Penguin, 2004.

MLA (9th ed.) Citation

Procopius Caesariensis 500-562 and G. A. Williamson. The Secret History. Penguin, 2004.