Long, Gavin
MacArthur as military commander
B.T. Batsford, 1969
 Buku Teks
Mohanlall, Premilla
Green malaysia rainforest encounters
Malaysian Timber Council, 2002
 Buku Referensi
Wood, Julia T., 1950-
Interpersonal communication: everyday encounters
Wadsworth and Cengage Learning, 2013
 Buku Teks
America
New York: W.W.Norton & Company, 1988,
 Buku Referensi
Cho, Hae-il
America
Dong-su-Munhak-sa, 1990
 Buku Teks