Hosford, William F.
Cambridge University Press , 2012
Buku Teks
Bhat, B.A.
Edinburgh, Scottish Academic Press
Buku Teks
Tracy, Edward B.
Dodd, Mead, , 1971
Buku Teks
Graff, Heinz
Edition Leipzig, 1973
Buku Teks
Pounds, Norman J. G.
Hutchinson University Library, 1969
Buku Teks