editor, Evan M. Berman
CRC Press, 2011
Buku Teks
King, John Kerry, author
Macmillan, 1956
Buku Teks
Martelino, Eduardo L.
Pageant Press , 1959
Buku Teks
Andriesse, Edo
Utrecht University, 2008
Buku Teks
Butwell, Richard
Frederick A. Praeger, 1962
Buku Teks