Aschheim, Joseph
Ohio A Bell & Howell 1, 1969
Buku Teks
Davidson, Paul, author
Edward Elgar, 2011
Buku Teks
Ferguson, C. E., author
Duke University Press, 1964
Buku Teks
Branson, William H., author
Harper & Row, 1979
Buku Teks
Leijonhufvud, Axel
London Oxford University Press , 1968
Buku Teks