Wilkinson, James, and Knighton, C. S., Crown and Cloister, the Royal Story of Westminster Abbey, Scala, 2010

Yeoman, Peter, Medieval Scotland, Historic Scotland, B. T. Batsford, 1995

Young, Alan, Robert the Bruces Rivals: The Comyns, 1212–1314, Tuckwell Press, 1997

Zacour, Norman, An Introduction to Medieval Institutions, St James Press, 1977

Отрывки, использованные в качестве эпиграфов к главам, взяты из:

The British History of Geoffrey of Monmouth (trans. A. Thompson, revised edn J. A. Giles) William Stevens (printer), London, 1842.