See Allo

Black, C.E., author

Twentieth Century Europe: a history

Alfred A. Knopf, 1966

Buku Teks

Keylor, William R., 1944-, author

The twentieth-century world : an international history

Oxford University Press, 1996

Buku Teks

Teed, Peter, author

A dictionary of twentieth century history 1914-1990

Oxford University Press , 1992

Buku Referensi

Nichols, Jeannette P., author

Twentieth century United States : a history

D. Appleton-Century, 1943

Buku Teks

Readings in twentieth-century European history

edited by Alexander Baltzly, A. William Salomone

Appleton-Century-Crofts, 1950

Buku Teks