"turnpikes." The Oxford Companion to Irish History. Oxford University Press. 2007. Encyclopedia.com. 9 Dec. 2009 <http://www.encyclopedia.com>.
"turnpikes." The Oxford Companion to Irish History. Oxford University Press. 2007. Encyclopedia.com. (December 9, 2009). http://www.encyclopedia.com/doc/1O245-turnpikes.html
"turnpikes." The Oxford Companion to Irish History. Oxford University Press. 2007. Retrieved December 09, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O245-turnpikes.html