Gathorne-Hardy, G.M.
Oxford University Press, 1952
Buku Teks
edited by Beth A. Simmons and Richard H. Steinberg
Cambridge University Press, 2006
Buku Teks
Fenwick, Charles G.
Appleton-Century-Crofts, 1948
Buku Teks
Shaw, Malcolm Nathan, 1947-
Cambridge, 2003
Buku Teks
Wallace, Rebecca M. M.
Sweet & Maxwell, 2013
Buku Teks