Grealy, M. D. (1991). Knock: Apparition Gable from 1879 to the present. Cashin Printing Services.
Chicago Style (17th ed.) CitationGrealy, Msgr Dominic. Knock: Apparition Gable from 1879 to the Present. Cashin Printing Services, 1991.
MLA (8th ed.) CitationGrealy, Msgr Dominic. Knock: Apparition Gable from 1879 to the Present. Cashin Printing Services, 1991.
Warning: These citations may not always be 100% accurate.