Whitelock, D.
Penguin Books, 1952
Buku Teks
Jack, Ian
Secker & Warburg , 1987
Buku Teks
Plumb, J.H. (John Harold), 1911-, author
Penguin Books , 1951
Buku Teks
Stauffer, Donald Alfred, author
Princeton University Press, 1941
Buku Teks
Thomson, David, author
Penguin Books , 1950
Buku Teks