Robinson, Danielm
Lonely Publications Pty Ltd, 2011
Buku Referensi
Mackinnon, John Ramsay
[publisher not identified], [date of publication not identified]
Buku Teks SO
King, Victor T.
Blackwell, 1993
Buku Teks
Mackinnon, John Ramsay
Borneo.amsterdam Time Life, 1975
Buku Teks
King, Victor T.
Blackwell, 1993
Buku Teks SO