Batra, Rajeev, author
Prentice-Hall, 1996
Buku Teks
Belch, George F., author
McGraw-Hill, Irwin, 2001
Buku Teks
Dyer, Gillian
Routledge, 1996
Buku Teks
Burton, Philip Ward, 1910-, author
NTC Business Book, 1991
Buku Teks
Lwin, May, author
Bhuana Ilmu Populer, 2005
Buku Teks