Yorkshire Heraldry Society. Aspects of heraldry. Yorkshire Heraldry Society.
Style de citation Chicago (17e éd.)Yorkshire Heraldry Society. Aspects of Heraldry. Leeds: Yorkshire Heraldry Society.
Style de citation MLA (8e éd.)Yorkshire Heraldry Society. Aspects of Heraldry. Yorkshire Heraldry Society.
Attention : ces citations peuvent ne pas être correctes à 100%.