Source at https://orkneyheritagesociety.org.uk/product/henry-sinclair-casebook/
Forlag
Orkney Heritage Society
Sitering
Grohse IP: Preface, to Vicki A. Hild's Henry Sinclair Casebook. In: Hild, Grohse IP. Henry Sinclair Casebook. 1st Sinclair Earl of Orkney, 9th Baron of Rosslyn 1345-1400: A Case Study Investigation of His Life, 2019. Orkney Heritage Society p. 7-9