Evans, Gareth, author
Beanland Lecture, 1989
Buku Teks
Thompson, Virginia
George Allen & Unwin, 1937
Buku Teks
Cultural and Social Centre for the Asian and Pacific Region, 1971
Buku Teks
National Archives of Malaysia, 2005
Buku Referensi
Haas, Egbert
Leiden Universitaire Pers Leiden 1956
Buku Teks