Johnson, Luke, author
Penguin book, 2013
Buku Teks
Bradberry, John, 1961-, author
American Management Association, 2011
eBooks
Katz, Jerome A., author
McGraw-Hill Irwin, 2014
Buku Teks
Hauken, Paul, author
Tan Xia Wenhua Chuban Gufen You xian Gongsi, 1989
Buku Teks
Maslen, Andy, author
Marshall Cavendish, 2011
Buku Teks