Carrell, Michael R.
Prentice-Hall, 1995
Buku Teks
Stone, Raymond J.
John Wiley & Sons, 1995
Buku Teks
Carrell, Michael R.
Macmillan, 1992
Buku Teks
by Herbert G. Henemen III ... [et.al.]
Richard D. Irwin, 1989
Buku Teks
Armstrong, Michael
Crest Publishing House, 1999
Buku Teks