Perry, Ralph Barton
George Braziller, Inc., 1956
Buku Teks
Huxley, Julian, compiler
A Mentor Book, 1957
Buku Teks
Sarton, George
George Braziller, Inc., 1956
Buku Teks
Gorbachev, Mikhail, author
I.B. Tauris, 2005
Buku Teks
Moniz, Amanda B., author
Oxford University Press, 2016
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