Lapidoth-Eschelbacher, Ruth
Martinus Nijhoff Publishers, 1982
Buku Teks
edited by C. J. Jenner and Tran Truong Thuy
Cambridge University Press, 2016
Buku Teks
Andrassy, Juraj
Columbia University Press, 1970
Buku Teks
Netherlands Institute of Transport , 1984
Buku Teks
Ramazani, R.K.
Sijthoff adn Noordhoff, 1979
Buku Teks