Francis, John de
Princeton University Press , 1950
Buku Teks
Smith, Vincent A.
The Clarendon Press, 1958
Buku Teks
Natarajan, A.
Asia Publishing House, 1959
Buku Teks
Smith, William Jay
Wesleyan University Press, 1961
Buku Teks
Roosevelt, Theodore
Prentice-Hall, 1961
Buku Teks