Franklin
The Northern earldoms : Orkney and Caithness from AD 870 to 1470 / Barbara E. Crawford.
MLA
Crawford, B. E. The Northern Earldoms : Orkney and Caithness From Ad 870 to 1470. .
APA
Crawford, B. E. The Northern earldoms : Orkney and Caithness from AD 870 to 1470. .
Chicago
Crawford, B. E. The Northern Earldoms: Orkney and Caithness From AD 870 to 1470.
