1Grimes, Ronald L. 1995 Beginnings in Ritual Studies, (revision of the 1982 edition) University of South Caroline Press: Columbia, South Caroline.
2Johnson, David (ed.) 1989 Ritual opera,operatic ritual : "Mu-lien rescues his mother" in Chinese popular culture. University of California Press:Berkeley, California.
3List, George 1963 " The Boundaries of Speech and Song". Ethnomusicology 7:1 - 16.
4McAllester, Ravid P. 1954 Enemy Way Music.Peabody Museum Papers, vol. 41, no. 3. Harward University Press: Cambridge, Massachusetts.