APA (7th ed.) Citation

John, E., Hall, L., & Huff, M. (2009). Billy Ellot Musicals. Hal Leonard.

Chicago Style (17th ed.) Citation

John, Elton, Lee Hall, and Mac Huff. Billy Ellot Musicals. Hal Leonard, 2009.

MLA (9th ed.) Citation

John, Elton, et al. Billy Ellot Musicals. Hal Leonard, 2009.