APA (7th ed.) Citation

Xenophon & Warner, R. (1952). The Persian expedition. Penguin Books.

Chicago Style (17th ed.) Citation

Xenophon and Rex Warner. The Persian Expedition. Harmondsworth [England]: Penguin Books, 1952.

MLA (9th ed.) Citation

Xenophon and Rex Warner. The Persian Expedition. Penguin Books, 1952.