Lawson, D., O'Keefe, D., & Monks of Downside Abbey. (2004). Gregorian chant. Virgin Classics.
Chicago Style (17th ed.) CitationLawson, David, Dustan O'Keefe, and Monks of Downside Abbey. Gregorian Chant. [London]: Virgin Classics, 2004.
MLA (8th ed.) CitationLawson, David, et al. Gregorian Chant. Virgin Classics, 2004.
Warning: These citations may not always be 100% accurate.