edited by B.M. Willet
George Philip and Son, 1981
Buku Referensi
Griffith, Martin
Routledge, 2002
Buku Teks
Frankel, Joseph
Oxford University Press, 1964
Buku Teks SO
edited by Beth A. Simmons and Richard H. Steinberg
Cambridge University Press, 2006
Buku Teks SO
edited by John Vogler and Mark F. Imber
Routledge , 1996
Buku Teks SO