Brown, Pauline
Page One Publishing, 2002
Buku Referensi
Firth, Jack, author
The Ramsay Head Press, 1979
Buku Teks
Naveh, Zen, author
Springer-Verlag, 1990
Buku Teks
Ganzl, kurt
Schirmer Books, 1994
Buku Referensi
Martin, Judy
Running Press, 1997.
Buku Teks