APA (7th ed.) Citation

Grey, Z., Harte, B., Henry, O., & Cooper, J. F. (1989). The Wild West. Peerage Books.

Chicago Style (17th ed.) Citation

Grey, Zane, Bret Harte, O. Henry, and James Fenimore Cooper. The Wild West. London: Peerage Books, 1989.

MLA (8th ed.) Citation

Grey, Zane, et al. The Wild West. Peerage Books, 1989.