The Metropolitan Museum of Art. "One Hundred Sixteenth Annual Report of the Trustees for the Fiscal Year July 1, 1985, through June 30, 1986." Annual Report of the Trustees of the Metropolitan Museum of Art 116 (1986). p. 33.
Wixom, William D., ed. Mirror of the Medieval World. New York: The Metropolitan Museum of Art, 1999. no. 269, p. 215.
Lee, Jennifer M. "A Souvenir on Your Hat: Medieval Christian Pilgrims' Badges." In Pilgrimage and Faith: Buddhism, Christianity, and Islam, edited by Virginia C. Raguin, Dina Bangdel, and F. E. Peters. Chicago: Serindia Publications, 2010. pp. 199-201, fig. 7.