Roberts, H. H. (1933). Form in primitive music: An analytical and comparative study of the melodic form of some ancient southern California Indian songs. American Library of Musicology W. W. Norton.
Lua i Stíl Chicago (17ú heag.)Roberts, Helen Heffron. Form in Primitive Music: An Analytical and Comparative Study of the Melodic Form of Some Ancient Southern California Indian Songs. New York: American Library of Musicology W. W. Norton, 1933.
Lua MLA (9ú heag.)Roberts, Helen Heffron. Form in Primitive Music: An Analytical and Comparative Study of the Melodic Form of Some Ancient Southern California Indian Songs. American Library of Musicology W. W. Norton, 1933.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.