Chunghwa Post Co. Ltd,
Majalah, Jurnal, Buletin
Ilivia Widiyaningsih, author
Universitas Indonesia, 2006
UI - Tesis (Membership)
Chen Chiung-ling, 2000
Buku Referensi
Rochmat Soemitro, author
Eresco, 1988
Buku Teks
Rochmat Soemitro, author
Eresco, 1988
Buku Teks