James, P., & horpe, I. J. (1994). Ancient inventions. Ballantine Books.
Chicago Style aipamenaJames, Peter, and I. J. horpe. Ancient Inventions. New York: Ballantine Books, 1994.
MLA aipamenaJames, Peter, and I. J. horpe. Ancient Inventions. Ballantine Books, 1994.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.