APA (7th ed.) Citation

Catholic Church., Gajard, J., & Abbaye Saint-Pierre de Solesmes. (1961). Gregorian chants: Septuagesima Sunday. London.

Chicago Style (17th ed.) Citation

Catholic Church., Joseph Gajard, and Abbaye Saint-Pierre de Solesmes. Gregorian Chants: Septuagesima Sunday. [New York]: London, 1961.

MLA (8th ed.) Citation

Catholic Church., et al. Gregorian Chants: Septuagesima Sunday. London, 1961.