Schmidt, Arno
Karlruhe Fischer 1959
Buku Teks
Budden, John
Longmans, Green and Co., 1951
Buku Teks
Talon, Henri A.
London Longmans 1956
Buku Teks
Mottram, R.H.
London Longmans 1953
Buku Teks
Mackinnon, John Ramsay
Borneo.amsterdam Time Life, 1975
Buku Teks