Kok, Roe‐Min. "Who Was Mignon? What Was She?: Popular Catholicism and Schumann's Requiem, Op. 98b." Rethinking Schumann. : Oxford University Press, 2011-01-19. Oxford Scholarship Online. 2011-05-01. Date Accessed 25 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195393859.001.0001/acprof-9780195393859-chapter-6>.
Kok, R.(2011-01-19). Who Was Mignon? What Was She?: Popular Catholicism and Schumann's Requiem, Op. 98b. In Rethinking Schumann. : Oxford University Press. Retrieved 25 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195393859.001.0001/acprof-9780195393859-chapter-6.
Kok, Roe‐Min. "Who Was Mignon? What Was She?: Popular Catholicism and Schumann's Requiem, Op. 98b." In Rethinking Schumann. : Oxford University Press, 2011-01-19. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195393859.001.0001/acprof-9780195393859-chapter-6.
Kok R. Who Was Mignon? What Was She?: Popular Catholicism and Schumann's Requiem, Op. 98b. In: Kok R, Tunbridge L. Rethinking Schumann. Oxford University Press; 2011. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195393859.001.0001/acprof-9780195393859-chapter-6. Accessed May 25, 2013.