FEUI, 2007
Majalah, Jurnal, Buletin
Fakultas ekonomi, 2012
Majalah, Jurnal, Buletin
Chua, Beng Huat
[Publisher not identified], 2002
Artikel Jurnal
edited by Denis Dwyer
Longman, 1990
Buku Teks
compiled and edited by Kees van Dijk and Jolanda Leemburg-den Hollander
KITLV Press, 1998
Buku Referensi