Hepokoski, James, and Warren Darcy. "The Secondary Theme (S) and Essential Expositional Closure (EEC): Initial Considerations." Elements of Sonata Theory: Norms, Types, and Deformations in the Late-Eighteenth-Century Sonata. : Oxford University Press, 2006-08-31. Oxford Scholarship Online. 2011-10-03. Date Accessed 19 Jun. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195146400.001.0001/acprof-9780195146400-chapter-7>.
Hepokoski, J., & Darcy, W.(2006-08-31). The Secondary Theme (S) and Essential Expositional Closure (EEC): Initial Considerations. In Elements of Sonata Theory: Norms, Types, and Deformations in the Late-Eighteenth-Century Sonata. : Oxford University Press. Retrieved 19 Jun. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195146400.001.0001/acprof-9780195146400-chapter-7.
Hepokoski, James, and Warren Darcy. "The Secondary Theme (S) and Essential Expositional Closure (EEC): Initial Considerations." In Elements of Sonata Theory: Norms, Types, and Deformations in the Late-Eighteenth-Century Sonata. : Oxford University Press, 2006-08-31. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195146400.001.0001/acprof-9780195146400-chapter-7.
Hepokoski J, Darcy W. The Secondary Theme (S) and Essential Expositional Closure (EEC): Initial Considerations. In: Hepokoski J, Darcy W. Elements of Sonata Theory: Norms, Types, and Deformations in the Late-Eighteenth-Century Sonata. Oxford University Press; 2006. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195146400.001.0001/acprof-9780195146400-chapter-7. Accessed June 19, 2013.