Talon, Henri A.
London Longmans 1956
Buku Teks
Mottram, R.H.
London Longmans 1953
Buku Teks
Mackinnon, John Ramsay, author
Borneo.amsterdam Time Life, 1975
Buku Teks
Dobree, Bonamy, author
The British Council by Longmans, Green, 1956
Buku Teks
Creighton, Donald, author
Macmillan, 1974
Buku Teks