Shelton, Dinah L., author
Edward Elgar, cop, 2014
Buku Teks
Brierly, J. L. (James Leslie), author
Bhratara, 1996
Buku Teks
Wallace, Rebecca M. M.
Sweet & Maxwell, 1992
Buku Teks
edited by Beth A. Simmons and Richard H. Steinberg
Cambridge University Press, 2006
Buku Teks
Fenwick, Charles G., author
Appleton-Century-Crofts, 1948
Buku Teks