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.) CitationCatholic 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.) CitationCatholic Church, et al. The Gregorian Sacramentary Under Charles the Great. [Henry Bradshaw Society], 1915.
Warning: These citations may not always be 100% accurate.