Nettl, B., & Myers, H. (1976). Folk music in the United States: An introduction (3d ed.). Wayne State University Press.
Lua i Stíl Chicago (17ú heag.)Nettl, Bruno, agus Helen Myers. Folk Music in the United States: An Introduction. 3d ed. Detroit: Wayne State University Press, 1976.
Lua MLA (9ú heag.)Nettl, Bruno, agus Helen Myers. Folk Music in the United States: An Introduction. 3d ed. Wayne State University Press, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.