Gershoy, Leo, author
Appleton Century Crofts, 1964
Buku Teks
FRIM-UNDP/GEF peat Swamp Forest Project, 2005
Buku Teks
Hurt, R. Douglas, author
Garland Publishing, 1994
Buku Referensi
Rothschild, Bruce M., author
Springer, 2012
eBooks
United Nations Centre for Regional Development , 1983
Buku Teks