Chronology of twentieth-century history : business and commerce, volume two
edited by Frank N. Magill
Fitzroy Dearborn, 1996
 Buku Referensi
Gilbert, Martin
A history of the twentieth century,volume one:1900-1933
Avon books, 1997
 Buku Teks
One hundred twentieth-century philosophers
edited by Stuart C. Brown, Diane Collinson, Robert Wilkinson
Routledge, 1998
 Buku Teks
Twentieth century physics : volume I
edited by Laurie M. Brown, Abraham Pais and Sir Brian Pippard
Institute of Physics Publishing ; American Institute of Physics Press, 1995
 Buku Referensi
Twentieth century physics; Volume II
edited by Laurie M. Brown, Abraham Pais and,Sir Brian Pippard
Institute of Physics Publishing ; American Institute of Physics Press, 1995
 Buku Referensi