Hill, Bridget
UCL Press , 1994
Buku Teks
Plumb, J.H. (John Harold), 1911-, author
Penguin Books, 1963
Buku Teks
Plumb, J.H. (John Harold), 1911-, author
Penguin Books , 1951
Buku Teks
Thomson, David, author
Penguin Books , 1950
Buku Teks
Stauffer, Donald Alfred, author
Princeton University Press, 1941
Buku Teks