APA-viite (7. p.)

Keppel, L. O. (1932). The passing of the Middle Ages. Catholic Truth Society.

Chicago-viite (17. p.)

Keppel, Leopoldina Olivia. The Passing of the Middle Ages. London: Catholic Truth Society, 1932.

MLA-viite (8. p.)

Keppel, Leopoldina Olivia. The Passing of the Middle Ages. Catholic Truth Society, 1932.