Collin, B. (1955). The riddle of a 13th century sword-belt: By Bertha Collin. The Heraldry Society.
Chicago-Zitierstil (17. Ausg.)Collin, Bertha. The Riddle of a 13th Century Sword-belt: By Bertha Collin. East Knoyle, Wiltshire: The Heraldry Society, 1955.
MLA-Zitierstil (8. Ausg.)Collin, Bertha. The Riddle of a 13th Century Sword-belt: By Bertha Collin. The Heraldry Society, 1955.
警告：這些引文格式不一定是100％准確.