Sayers, R.S.
Clarendon Press, 1958
Buku Teks
Chandavarkar, Anand G.
St. Martin`s Press, 1996
Buku Teks SO
Bradford, Frederick A.
Longmans, Green, 1932
Buku Teks
Rodgers, Raymond
Alexander Hamiltion Institute, 1962
Buku Teks SO
Thorne, W.J.
Oxford University Press , 1948
Buku Teks