APA

Harper J., . (1991). The forms and orders of Western liturgy from the tenth to the eighteenth century: a historical introduction and guide for students and musicians. New York, NY: Oxford University Press.

Chicago

Harper John, . 1991. The forms and orders of Western liturgy from the tenth to the eighteenth century: a historical introduction and guide for students and musicians. New York, NY: Oxford University Press.

Harvard

Harper J., . (1991). The forms and orders of Western liturgy from the tenth to the eighteenth century: a historical introduction and guide for students and musicians. New York, NY: Oxford University Press.

MLA

Harper John, . The forms and orders of Western liturgy from the tenth to the eighteenth century: a historical introduction and guide for students and musicians. New York, NY: Oxford University Press. 1991.