National Archieves of Malaysia, 2011
Buku Referensi
Lee, Kim Chew, author
ISEAS Publishing, Singapore : Mainland Press, 2015
Buku Teks
Dita Putri Prameswari, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2007
UI - Skripsi (Membership)
Ward, Ian
Media Master, 1996
Buku Teks
Duhigg, Charles, author
Heinemann, 2012
Buku Teks