Jacqueline I. Kroschwitz, executive editor
Wiley, 1990
Buku Referensi
Manila : De La Saller University, 2007,
Majalah, Jurnal, Buletin
Shackelford, James F., author
CRC Press, 2001
Buku Referensi
Banerjee, P.K., author
McGraw-Hill, 1981
Buku Teks
Hines, William W., author
John Wiley & Sons, 1980
Buku Teks