APA (7th ed.) Citation

Willis, G. G. (1964). Essays in early Roman liturgy. S.P.C.K.

Chicago Style (17th ed.) Citation

Willis, Geoffrey Grimshaw. Essays in Early Roman Liturgy. London: S.P.C.K, 1964.

MLA (9th ed.) Citation

Willis, Geoffrey Grimshaw. Essays in Early Roman Liturgy. S.P.C.K, 1964.