Kelly, Lois, 1955- , author
American Management Association, 2007
eBooks
Aris Subagio, author
2019
UI - Tesis (Membership)
Egan, John, 1952-
Thomson Learning,, 2007
Buku Teks
Blythe, Jim, author
Prentice-Hall, 2000
Buku Teks
Eagle, Lynne, author
Taylor & Francis Group, 2015
Buku Teks