edited by David Cass, Karl Shell
Academic Press, 1976
Buku Teks
Nolan, Mary
Bailliere Tindall, 1998
Buku Teks
Nicholson, Michael
Liverpool University Press , 1972
Buku Teks
Cameron, Norman
Houghton Mifflin, 1963
Buku Teks
Bartok, M.
John Wiley & Sons, 1985
Buku Teks