Yorkshire Heraldry Society. Aspects of heraldry. Yorkshire Heraldry Society.
Cita Chicago Style (17a ed.)Yorkshire Heraldry Society. Aspects of Heraldry. Leeds: Yorkshire Heraldry Society.
Cita MLA (8a ed.)Yorkshire Heraldry Society. Aspects of Heraldry. Yorkshire Heraldry Society.
Precaución: Estas citas no son 100% exactas.