Murdin, Paul, author
Secrets of the universe: how we discovered the cosmos
Thames &​ Hudson, 2009
 Buku Referensi
Kinsella, Sophie, author
Finding Audrey
Doubleday, 2015
 Buku Teks
Huntington, Ellsworth, author
Mainsprings of civilization
John Wiley & Sons, 1945
 Buku Teks
Toynbee, Arnold J., author
Civilization on trial
Oxford University Press , 1957
 Buku Teks
Brinton, Crane, 1898-1968, author
A history of civilization
Prentice-Hall, 1960
 Buku Teks
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