Johnson, Peggy
[American Management Association, ], 2009
eBooks
Nasution, Khoo Salma, author
Janus Print & Resources, 2003
Buku Referensi
compiled by China Cultural Relics Academy, and editor by Luo Zhewn
Intercontinental Press, 2008
Buku Referensi
Artikel Jurnal
Artikel Jurnal