Hadlington, P., author
New South Wales University Press, 1985
Buku Teks
Artikel Jurnal
Pusat Penelitian Teh dan Kina, 1996
Buku Referensi
Kusnaedi, author
Panebar Swadaya, 2005
Buku Teks
Ahmad Burhanudin, author
Fakultas Hukum Universitas Indonesia, 2007
UI - Tesis (Open)