Reed, David, author
American Management Association;, 2008
eBooks
Naparstek, Nathan, author
Mc Graw Hill, 2006
Buku Teks
Altfest, Lewis J.
McGraw-Hill, 1992
Buku Teks
Nass, Ruth D., author
Indeks, 2012
Buku Teks
Hollins, Carole, author
Blackwell Munksgaard, 2006
Buku Teks