Abbott, E. A.
London Seeley 1899
Buku Teks
Russell, C.H.St.L.
London MacMillan 1907
Buku Teks
Nash-Williams, A.H.
London MacMillan 1950
Buku Teks
Smith, William, author
London, John Murray
Buku Referensi
edited by P.G.W. Glare
Oxford University Press, 2004
Buku Referensi