APA (7th ed.) Citation

Xenophon, Harper, W. R., & Wallace, J. (1921). ... Anabasis: Seven books. American Book Co.

Chicago Style (17th ed.) Citation

Xenophon, William Rainey Harper, and James Wallace. ... Anabasis: Seven Books. New York: American Book Co, 1921.

MLA (8th ed.) Citation

Xenophon, et al. ... Anabasis: Seven Books. American Book Co, 1921.