APA-referens (7:e uppl.)
Toolis, R., & Bowles, C. (2017). The lost Dark Age kingdom of Rheged: The discovery of a royal stronghold at Trusty's Hill, Galloway. Oxbow Books.
Chicago-referens (17:e uppl.)
Toolis, Ronan, och Christopher Bowles. The Lost Dark Age Kingdom of Rheged: The Discovery of a Royal Stronghold at Trusty's Hill, Galloway. Oxford, [England] ; Philadelphia, Pennsylvania: Oxbow Books, 2017.
MLA-referens (9:e uppl.)
Toolis, Ronan, och Christopher Bowles. The Lost Dark Age Kingdom of Rheged: The Discovery of a Royal Stronghold at Trusty's Hill, Galloway. Oxbow Books, 2017.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.