Fragile Earth: Dramatic views of our changing world
Collins, 2012
 Buku Referensi
Inventors and discoverers : changing our world
National Geographic Book Service
National Geographic Society, 1988
 Buku Referensi
Saaty, Thomas L., author
Embracing the future : meeting the challenge of our changing world
Praeger, 1990
 Buku Teks
Garland, John K., author
Chemistry of our world
Macmillan, 1975
 Buku Teks
Gaunt, Jeremy, author
Our world now : Reuters
Thames & Hudson, 2010
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