Bannon, John Francis, author
McGraw-Hill, 1952
Buku Teks
Elton, Geoffrey Rudolph, author
Sydney University Press, 1967
Buku Teks
McCullagh, C. Behan, author
Routledge, 1998
Buku Teks
Thapar, Romila, author
Penguin Books, 1969
Buku Teks
Carr, E.H. (Edward Hallet), author
Vintage Books, 1961
Buku Teks