Lavigne, A., Gottwald, L., Anders, A., & Davis, T. (2009). Keep holding on: For SATB, solos and piano with optional instrumental accompaniment. Hal Leonard.
芝加哥风格引文Lavigne, Avril, Lukasz Gottwald, Adam Anders, 与 Tim Davis. Keep Holding on: For SATB, Solos and Piano with Optional Instrumental Accompaniment. Milwaukee, Wis: Hal Leonard, 2009.
MLA引文Lavigne, Avril, et al. Keep Holding on: For SATB, Solos and Piano with Optional Instrumental Accompaniment. Hal Leonard, 2009.
警告：这些引文格式不一定是100％准确.