Carty, Anthony
Edinburgh University Press, 2007
Buku Teks SO
Johnson, Alvin S.
Rineka Cipta, 2004
Buku Teks
Hall, Jerome
Louisiana State University Press, 1963
Buku Klasik
Sawer, Geoffrey, 1910-1996
Clarendon Press, 1965
Buku Teks
Sudargo Gautama
Alumni, 1972
Buku Teks