APA (7th ed.) Citation

Catholic Church, Gajard, J., & Abbaye Saint-Pierre de Solesmes. Choir. (1956). Gregorian chant. London.

Chicago Style (17th ed.) Citation

Catholic Church, Joseph Gajard, and Abbaye Saint-Pierre de Solesmes. Choir. Gregorian Chant. [S.l.]: London, 1956.

MLA (8th ed.) Citation

Catholic Church, et al. Gregorian Chant. London, 1956.