Knowles, B., Tedder, R., Bogart, E., Anders, A., Davis, T., & Lojeski, E. (2008). Halo: From Girls' sing off. Hal Leonard.
Chicago-viite (17. p.)Knowles, Beyonce, Ryan Tedder, Evan Bogart, Adam Anders, Tim Davis, ja Ed Lojeski. Halo: From Girls' Sing off. Milwaukee, Wis: Hal Leonard, 2008.
MLA-viite (9. p.)Knowles, Beyonce, et al. Halo: From Girls' Sing off. Hal Leonard, 2008.
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