Berman, Paul Schiff, 1966-, author
Cambridge University Press, 2012
Buku Teks
Glendon, Mary Ann
ST. Paull Minn, 1999
Buku Teks
David, Rene, 1906-, author
Stevens & sons, 1985
Buku Teks
Wolfke, Karol
Martinus Nijhoff , 1993
Buku Teks
Lewin, Julius
African Bookman, 1947
Buku Teks