Ashton, Robert
Weidenfeld and Nicolson, 1979
Buku Teks
Gardiner, Samuel Rawson
Longmans, Green, 1890
Buku Teks
edited by Margo Todd
Routledge, 1995
Buku Teks
Bennett, Martyn
Routledge, 2000
Buku Teks
Irma Taavitsainen, Paivi Pahta, editor
Cambridge University Press, 2011
Buku Teks