Παραπομπή σε μορφή APA (7η εκδ.)

Duggan, J. F. (1991). Spiritual Roots: The Roman Catholic Archdiocese of Toronto at 150 Years of Age. Toronto.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Duggan, John; Fey. Spiritual Roots: The Roman Catholic Archdiocese of Toronto at 150 Years of Age. Toronto, 1991.

Παραπομπή σε μορφή MLA (8th εκδ.)

Duggan, John; Fey. Spiritual Roots: The Roman Catholic Archdiocese of Toronto at 150 Years of Age. Toronto, 1991.