Albright, Adam. "The Morphological Basis of Paradigm Leveling." Paradigms in Phonological Theory. : Oxford University Press, 2004-12-09. Oxford Scholarship Online. 2010-01-01. Date Accessed 22 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199267712.001.0001/acprof-9780199267712-chapter-2>.
Albright, A.(2004-12-09). The Morphological Basis of Paradigm Leveling. In Paradigms in Phonological Theory. : Oxford University Press. Retrieved 22 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199267712.001.0001/acprof-9780199267712-chapter-2.
Albright, Adam. "The Morphological Basis of Paradigm Leveling." In Paradigms in Phonological Theory. : Oxford University Press, 2004-12-09. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199267712.001.0001/acprof-9780199267712-chapter-2.
Albright A. The Morphological Basis of Paradigm Leveling. In: Downing LJ, Hall TA, Raffelsiefen R. Paradigms in Phonological Theory. Oxford University Press; 2004. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199267712.001.0001/acprof-9780199267712-chapter-2. Accessed May 22, 2013.