Wagner, Richard, author
Edward Elgar, 2012
Buku Teks
edited by George Kopits
Oxford University Press, 2013
Buku Teks
Lindholm, Richard W., author
Pitman, 1950
Buku Teks
Lee, Jyh-an, author
Edward Elgar, 2012
Buku Teks
Edited by Scott Jasper
Stanford Security Studies, 2010
Buku Teks