Shakespeare-Badge Lacy knot Hugh Clark: A Short and Easy Introduction to Heraldry. Part 2. 10th edition, with considerable improvements. Printed for H. Washbourn
Fußballverein vor gefälschten Produkten schützen konnte. The Heraldry Gazette. The Heraldry Society. theheraldrysociety.com 2008-03. The Liver Bird. National
2006, ISBN 2-84394-861-4. Arthur Charles Fox-Davies: A Complete Guide to Heraldry. Lightning Source, La Vergne TN 2009, ISBN 978-1-4437-5719-5. Commons:
Beschreibung des Wappens Franziskus’ (vatican.va) Donald Lindsay Galbreath, Papal Heraldry, Second Edition Revised by Geoffrey Briggs, London 1972, S. 38: "Boniface