Polman, Katrien
The Hague Martinus Nijhoff, 1981
Buku Referensi
Gershoy, Leo, author
Appleton Century Crofts, 1964
Buku Teks
FRIM-UNDP/GEF peat Swamp Forest Project, 2005
Buku Teks
Orta, John, author
Garland Publishing, 1988
Buku Referensi
Hurt, R. Douglas, author
Garland Publishing, 1994
Buku Referensi