Graham & Trotman 1993, 1993
Buku Teks
Tjuk Kuswartojo
Dikti , 1997
Buku Teks
by Martin Beyersdorff [and others]
Wiley, 2014
Buku Teks
Evans, Thomas G., author
PWS-KENT Publishing, 1988
Buku Teks
Mac Dangall, Curtis D., author
Macmillan, 1967
Buku Teks