Ekirch, A. Roger
Cloarendon Press, 1987
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
Robson, L.L., author
Cambridge University Press, 1976
Buku Teks