Robbins, Lionel, editor
McMillan & Co., 1952
Buku Teks
Plumb, J.H. (John Harold), 1911-, author
Penguin Books , 1951
Buku Teks
edited with an introduction by A.E. Musson
Methuen, 1972
Buku Teks
Plumb, J.H. (John Harold), 1911-, author
Penguin Books, 1963
Buku Teks
Thomson, David, author
Penguin Books , 1950
Buku Teks