Horne, Alistair, author
Praeger, 1956.
Buku Teks
Webster, J.B.
Praeger, 1967
Buku Teks
Emerson, Rupert, author
Harvard University Press, 1962
Buku Teks
Emerson, Rupert, author
Harvard University Press, 1967
Buku Teks
Rosario, Teresita Cruz-Del, author
Palgrave Macmillan, 2016
Buku Teks