Yeo, Michelle Mei Ling, author
World Scientific, 2017
Buku Teks
Taylor, Mike
Crowood Press, 1995
Buku Teks
Malmberg, Bertil, editor
Presses universitaires de France, 1960
Buku Teks
Patzer, Gordon L., author
American Management Association, 2008
eBooks
Andi Eriawan, author
GagasMedia, 2013
Buku Teks