Cowell, H. (1993). Piano music. Smithsonian-Folkways.
Cita Chicago Style (17a ed.)Cowell, Henry. Piano Music. [S.l.]: Smithsonian-Folkways, 1993.
Cita MLA (9a ed.)Cowell, Henry. Piano Music. Smithsonian-Folkways, 1993.
Precaución: Estas citas no son 100% exactas.