Mohanlall, Premilla
Green malaysia rainforest encounters
Malaysian Timber Council, 2002
 Buku Referensi
Indonesia's forest diplomacy: Pathway to green revolution
 Artikel Jurnal
Rutherfurd, Edward
The forest
Ballantine Books, 2000
 Buku Teks SO
Thorp, Roderick
Into the forest
Random House, 1961
 Buku Teks SO
Wood, Julia T., 1950-
Interpersonal communication: everyday encounters
Wadsworth and Cengage Learning, 2013
 Buku Teks SO