APA (7th ed.) Citation

Catholic Church, Biblioteca apostolica vaticana, Wilson, H. A., & Charlemagne, E. (1915). The Gregorian sacramentary under Charles the Great. [Henry Bradshaw Society].

Chicago Style (17th ed.) Citation

Catholic Church, Biblioteca apostolica vaticana, H. A. Wilson, and Emperor Charlemagne. The Gregorian Sacramentary Under Charles the Great. London: [Henry Bradshaw Society], 1915.

MLA (8th ed.) Citation

Catholic Church, et al. The Gregorian Sacramentary Under Charles the Great. [Henry Bradshaw Society], 1915.