Yergin, Daniel
Random House, 1993
Buku Teks
Salisbury, Harrison E., author
Harper & Row , 1962
Buku Teks
Vernadsky, George
Yele University Press, 1953
Buku Teks
Lawrence, John
Farrar Straus & Cudahy, 1959
Buku Teks
Wallace, Robert, author
Time-Life Books, 1967
Buku Teks