APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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