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Needham, 1979, p. 21. Needham, Paul (1979). Twelve centuries of bookbindings, 400-1600. New York: Pierpont Morgan Library : Oxford University Press. OCLC947750675.
Diehl, 1979, p. 19. Diehl, Edith (1979). Bookbinding: its background and technique. Vol. 1. Vol. 1. New York: Hacker Art Books. OCLC724095800.
Needham, 1979, pp. 24-29. Needham, Paul (1979). Twelve centuries of bookbindings, 400-1600. New York: Pierpont Morgan Library : Oxford University Press. OCLC947750675.
Diehl, 1979, p. 52. Diehl, Edith (1979). Bookbinding: its background and technique. Vol. 1. Vol. 1. New York: Hacker Art Books. OCLC724095800.
Marks, 1998, p. 57. Marks, P. J. M (1998). The British Library guide to bookbinding: history and techniques. Toronto; Buffalo: University of Toronto Press. ISBN978-0-8020-8176-6. OCLC444162326.
Marks, 1998, p. 59. Marks, P. J. M (1998). The British Library guide to bookbinding: history and techniques. Toronto; Buffalo: University of Toronto Press. ISBN978-0-8020-8176-6. OCLC444162326.