Clements, Phil, author
Erlangga, 2001
Buku Teks
Hansen, Mark Victor, author
Gramedia Pustaka Utama, 2006
Buku Teks
Manurung, Adler Haymans, 1961-, author
Kompas, 2005
Buku Teks
Scott, Gini Graham, author
American Management Association, 2009
eBooks
Atri Widyanari, author
PT Bentang Pustaka, 2016
Buku Teks