Lockett, David M.
NTC Business Books, 1989
Buku Teks
Ahuja, B. N., author
Surjeet Publications, 1990
Buku Teks
Belch, George E., author
McGraw-Hill, 2007
Buku Teks
Belch, George E., author
McGraw-Hill, [, 2004]
Buku Teks
Spitzer, Harry, author
Harper & Row, 1982
Buku Teks