FRIM-UNDP/GEF peat Swamp Forest Project, 2005
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Strange, Morten
Periplus Editions, 1998
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McClure, H. Elliott (Howe Elliott), 1910-
SEATO, 1974
Buku Teks
McClure, H. Elliott (Howe Elliott), 1910-
Applied Scientific Research Corporation, [date of publication not identified]
Buku Referensi
Dobby, E.H.G. (Ernest Henry George), 1906-1981
University of London Press, 1950
Buku Teks