APA (7th ed.) Citation

Discantus (Musical group), Lesne, B., & Pérotin, -. (2001). Quem quaeritis? Opus 111.

Chicago Style (17th ed.) Citation

Discantus (Musical group), Brigitte Lesne, and -1238? Pérotin. Quem Quaeritis? Paris, France: Opus 111, 2001.

MLA (9th ed.) Citation

Discantus (Musical group), et al. Quem Quaeritis? Opus 111, 2001.