Aspect and Reference Time. : Oxford University Press, 2006-08-31. Oxford Scholarship Online. 2010-01-01. Date Accessed 23 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199291298.001.0001/acprof-9780199291298>.
(2006-08-31). Aspect and Reference Time. : Oxford University Press. Retrieved 23 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199291298.001.0001/acprof-9780199291298.
Aspect and Reference Time. : Oxford University Press, 2006-08-31. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199291298.001.0001/acprof-9780199291298.
Borik O. Aspect and Reference Time. Oxford University Press; 2006. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199291298.001.0001/acprof-9780199291298. Accessed May 23, 2013.