APA (7th ed.) Zitazioa

Schoenfeld, M., & Mcpherson, B. (2002). Once Upon a Time. Hal Leonard Music Publishing.

Chicago Style (17th ed.) Zitazioa

Schoenfeld, Mark, eta Barri Mcpherson. Once Upon a Time. Wisconsin, United States: Hal Leonard Music Publishing, 2002.

MLA (9th ed.) Zitazioa

Schoenfeld, Mark, eta Barri Mcpherson. Once Upon a Time. Hal Leonard Music Publishing, 2002.