Beatty, Richard H.
John Wiley & Sons, 1995
Buku Teks
Beatty, Richard H.
John Wiley & Sons, 1986
Buku Teks
Falcone, Paul, author
American Management Association, 2009
eBooks
McGraw-Hill/Glencoe, 2003
Buku Teks
Popovich, Igor S., author
Abdi Tandur, 1996
Buku Teks