Tosh, John
The Pursuit of history : aims, methods and new directions in the study of modern history
Longman , 1991
 Buku Teks SO
Tawney, R.H.
Equality
George Allen and Unwin, 1952
 Buku Teks
hapus4
Equality
China Renmin University Press, 2015
 eBooks
Bailey, Thomas Andrew, 1902-1983
The American pageant: a history of the Republic
D.C. Healt, 1987
 Buku Teks
Herget, James E.
American jurisprudence: a history
Texas: Rice University Press, 1990,
 Buku Referensi