Hilley, M., & Olson, L. F. (2002). Piano for pleasure: A basic course for adults (4th ed.). Schirmer/Cengage.
Lua i Stíl Chicago (17ú heag.)Hilley, Martha, agus Lynn Freeman Olson. Piano for Pleasure: A Basic Course for Adults. 4th ed. Boston, Mass: Schirmer/Cengage, 2002.
Lua MLA (9ú heag.)Hilley, Martha, agus Lynn Freeman Olson. Piano for Pleasure: A Basic Course for Adults. 4th ed. Schirmer/Cengage, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.