Sondeno, Stanley R.
Business Publications, 1985
Buku Teks
Steinhoff, Dan
McGraw-Hill International Book Company, 1982
Buku Teks
Pickle, Hal. B.
John Wiley & Sons, 1984
Buku Teks
Globerman, Steven
Prentince-Hall, 1986
Buku Teks
Hodgetts, Richard M.
Harcourt College Publishers, 2001
Buku Teks