Masters, Gilbert M.
Prence Hall International , 1991
Buku Teks
Artikel Jurnal
Russo, Mark F., author
John Wiley & Sons, 1999
Buku Teks
editors in chief, Sybil P. Parker, Robert A. Corbitt
McGraw-Hill, 1993
Buku Referensi
Rosenkrantz, Walter A., author
CRC Press, Taylor and Francis Group, 2009
Buku Teks