APA (7th ed.) Citation

Higham, N. J. (2015). Ecgfrith: King of the Northumbrians ; high-king of Britain. Shaun Tyas.

Chicago Style (17th ed.) Citation

Higham, N. J. Ecgfrith: King of the Northumbrians ; High-king of Britain. Donington: Shaun Tyas, 2015.

MLA (9th ed.) Citation

Higham, N. J. Ecgfrith: King of the Northumbrians ; High-king of Britain. Shaun Tyas, 2015.