APA (7 वां संस्करण) प्रशस्ति पत्र

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

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

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

एमएलए (9वां संस्करण) प्रशस्ति पत्र

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