Cita APA (7th ed.)

Collin, B. (1955). The riddle of a 13th century sword-belt: By Bertha Collin. The Heraldry Society.

Cita Chicago (17th ed.)

Collin, Bertha. The Riddle of a 13th Century Sword-belt: By Bertha Collin. East Knoyle, Wiltshire: The Heraldry Society, 1955.

Cita MLA (8th ed.)

Collin, Bertha. The Riddle of a 13th Century Sword-belt: By Bertha Collin. The Heraldry Society, 1955.