Bowey, Angela
Macmillan, 1974
Buku Teks
Mello, Jeffrey A., author
Thomson Corporation, 2006
Buku Teks
Rothwell, William J., 1951-, author
American Management Association, 2012
eBooks
Stone, Raymond J., author
John Wiley & Sons, 1995
Buku Teks
Armstrong, Michael, author
Crest Publishing House, 1999
Buku Teks