Gopal, Sarvepalli, author
Oxford University Press, 1992
Buku Teks
Wallace, W. Stewart, author
Macmillan, 1945
Buku Referensi
oratio Alger Association of Distinguished Americans, 1996
Buku Teks
Ueberroth, Peter, author
William Morrow, 1985
Buku Teks
Josephson, Matthew, author
McGraw-Hill, 1959
Buku Teks