Historical Syntax and Linguistic Theory. : Oxford University Press, 2009-03-12. Oxford Scholarship Online. 2009-05-01. Date Accessed 25 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199560547.001.0001/acprof-9780199560547>.
(2009-03-12). Historical Syntax and Linguistic Theory. : Oxford University Press. Retrieved 25 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199560547.001.0001/acprof-9780199560547.
Historical Syntax and Linguistic Theory. : Oxford University Press, 2009-03-12. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199560547.001.0001/acprof-9780199560547.
Crisma P, Longobardi G. Historical Syntax and Linguistic Theory. Oxford University Press; 2009. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199560547.001.0001/acprof-9780199560547. Accessed May 25, 2013.