http://www.eupjournals.com/doi/abs/10.3366/shr.2004.83.1.3 Stevenson, Katie "The Unicorn, St Andrew and the Thistle: Was there an Order of Chivalry in Late Medieval Scotland?", Scottish Historical Review. Volume 83, Page 3-22, April 2004
Order of Wear, su honours.gov.uk, Ceremonial Secretariat, Cabinet Office, 13 novembre 2006. URL consultato il 20 febbraio 2007 (archiviato dall'url originale il 28 gennaio 2007).