Jeong, How-Won
Ashgate, 2000
Buku Teks SO
McNeil, John D.
Litle Brown, 1977
Buku Teks
edited by Helmut Greim, Robert Snyder
John Wiley & Sons, 2008
eBooks
Kivimaki, Timo
Imperial College Press, 2016
Buku Teks
Brierly, J. L. (James Leslie)
At The Clarendon Press, 1955
Buku Teks SO