Paddy Bowie
Ministry of Foreign Affairs, 2006
Buku Teks
Mohamad Kadim Bin Suaidi
Penerbit Universiti Teknikal Malaysia Melaka, 2009
Buku Teks
Yu, E.
MPH Group Publishing Sdn Bhd, 2008
Buku Teks
Plate, Tom
Marshall Cavendish Editions, 2011
Buku Teks
Mahathir bin Mohamad, 1925-
MPH Group Publishing, 2010
Buku Referensi