APA-referens (7:e uppl.)

Petre, M. D. (1903). The temperament of doubt. Catholic Truth Society.

Chicago-referens (17:e uppl.)

Petre, Maude Dominica. The Temperament of Doubt. London: Catholic Truth Society, 1903.

MLA-referens (8:e uppl.)

Petre, Maude Dominica. The Temperament of Doubt. Catholic Truth Society, 1903.