Buchanan, Robert Angus
Industrial archaeology in Britain
Penguin, 1972
 Buku Teks SO
Archaeology
edited by Mari Pritchard Parker, Elvio Angeloni
McGraw-Hill, 2013
 Buku Teks SO
Doe, Norman
Fundamental authority in late medieval English law
Cambridge University Press, 1990
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A companion medieval English literature and culture c.1350-c.1500
Peter Brown, editor
Blackwell Publishing, 2007
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Coulton, G.G. [George Gordon]
Medieval panorama: the English scene from conquest to reformation
Macmillan; University Press, 1938
 Buku Teks SO