edited by B.M. Willet
George Philip and Son, 1981
Buku Referensi
Griffith, Martin
Routledge, 2002
Buku Teks
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
Spero, Joan Edelman
Routledge , 1997
Buku Teks