Kinderman, William. "Preface." Beethoven's Diabelli Variations. : Oxford University Press, 2008-04-15. Oxford Scholarship Online. 2011-10-03. Date Accessed 18 Jun. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195342369.001.0001/acprof-9780195342369-chapter-10>.
Kinderman, W.(2008-04-15). Preface. In Beethoven's Diabelli Variations. : Oxford University Press. Retrieved 18 Jun. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195342369.001.0001/acprof-9780195342369-chapter-10.
Kinderman, William. "Preface." In Beethoven's Diabelli Variations. : Oxford University Press, 2008-04-15. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195342369.001.0001/acprof-9780195342369-chapter-10.
Kinderman W. Preface. In: Kinderman W. Beethoven's Diabelli Variations. Oxford University Press; 2008. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195342369.001.0001/acprof-9780195342369-chapter-10. Accessed June 18, 2013.