Martinus Nijhoff Publishers, 1995
Buku Teks
Forsythe, David P., 1941-, author
University of Nebraska Press, 1983
Buku Teks
Selby, David, author
Cambridge University Press, 1988
Buku Teks
Gerber, Paula, author
Edward Elgar, [2013;2013;2013, 2013]
Buku Teks
Unesco, 1970
Buku Teks