Warbasse, James Peter
N.Y. Harper and Brothers Pub., 1936
Buku Teks
Morrell, W.P.
Clarendon Press, 1960
Buku Teks
Williams, Basil
Oxford University, 1945
Buku Klasik
Lavell, C.F.
Macmillan, 1919
Buku Teks
Stahl, Kathleen M.
Faber and Faber, 1950
Buku Teks