APA (7th ed.) Citation

James, G. P. R. 1., Harper, J., & Harper, J. (1831). The history of chivalry. [s.n].

Chicago Style (17th ed.) Citation

James, G. P. R. 1801?-1860, John Harper, and James Harper. The History of Chivalry. New York: [s.n], 1831.

MLA (9th ed.) Citation

James, G. P. R. 1801?-1860, et al. The History of Chivalry. [s.n], 1831.