Cita APA (7th ed.)

Hilley, M., & Olson, L. F. (2002). Piano for pleasure: A basic course for adults (4th ed.). Schirmer/Cengage.

Cita Chicago (17th ed.)

Hilley, Martha, i Lynn Freeman Olson. Piano for Pleasure: A Basic Course for Adults. 4th ed. Boston, Mass: Schirmer/Cengage, 2002.

Cita MLA (9th ed.)

Hilley, Martha, i Lynn Freeman Olson. Piano for Pleasure: A Basic Course for Adults. 4th ed. Schirmer/Cengage, 2002.