APA (7e ed.) Bronvermelding

Lavigne, A., Gottwald, L., Anders, A., & Davis, T. (2009). Keep holding on: For SATB, solos and piano with optional instrumental accompaniment. Hal Leonard.

Chicago (17e ed.) Bronvermelding

Lavigne, Avril, Lukasz Gottwald, Adam Anders, en Tim Davis. Keep Holding on: For SATB, Solos and Piano with Optional Instrumental Accompaniment. Milwaukee, Wis: Hal Leonard, 2009.

MLA (9e ed.) Bronvermelding

Lavigne, Avril, et al. Keep Holding on: For SATB, Solos and Piano with Optional Instrumental Accompaniment. Hal Leonard, 2009.