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The Johns Hopkins Press , 1963
Buku Teks
Long, Gavin, author
B.T. Batsford, 1969
Buku Teks
Mohanlall, Premilla
Malaysian Timber Council, 2002
Buku Referensi
Wood, Julia T., 1950-, author
Wadsworth and Cengage Learning, 2013
Buku Teks
New York: W.W.Norton & Company, 1988,
Buku Referensi