Gooszen, Hans, author
KITLV Press, 1999
Buku Teks
Raoul Oberman ... [and others]
McKinsey & Company, 2012
Buku Teks
Wallace, Alfred Russel, 1823-1913, author
Dover Publications, 1869
Buku Teks
Dekranas, 2009
Buku Referensi
Harry, Robert R
Washington DC The Pacific Science Board 1953
Buku Teks