Untermeyer, Louis, editor
Makers of the modern world : the lives of ninety-two writers, artists, scientists, statesmen, inventors, philosophers, composers, and other creators who formed the pattern of our century / by Louis Untermeyer
Simon and Schuster, 1955
Buku Teks
Garland, John K.
Chemistry of our world
Macmillan, 1975
Buku Teks
Gaunt, Jeremy
Our world now : Reuters
Thames & Hudson, 2010
Buku Referensi
Our world's heritage
National Geographic Book Service.
National Geographic Society, 1987
Buku Referensi
Kolevzon, Edward R.
Our world and its people
Allyn and Bacon, 1959
Buku Teks