Cita APA (7th ed.)

Hilley, M., & Olson, L. F. (1998). Piano for pleasure: A basic course for adults (3rd ed.). Wadsworth Pub.

Cita Chicago (17th ed.)

Hilley, Martha, i Lynn Freeman Olson. Piano for Pleasure: A Basic Course for Adults. 3rd ed. Belmont, Calif: Wadsworth Pub, 1998.

Cita MLA (9th ed.)

Hilley, Martha, i Lynn Freeman Olson. Piano for Pleasure: A Basic Course for Adults. 3rd ed. Wadsworth Pub, 1998.