Folsom, James K.
Timothy Flint
Twayne Publishers, 1965
 Buku Teks
Churchill, Winston, Sir, 1874-1965
Frontiers and wars
Harcourt, Brace & World, 1962
 Buku Teks
Shirras, G. Findley
The burden of British taxation / G. Findley Shirras
Cambridge University Press , 1942
 Buku Teks
Sanders, Lawrence
Timothy`s game / Lawrence Sanders
Berkley books , 1988
 Buku Teks
McCoubrey, Hilaire
International organizations and civil wars
Brookfield Dartmouth , 1995
 Buku Teks