"hiccup." A Dictionary of Nursing. Oxford University Press. 2008. Encyclopedia.com. 10 Jul. 2009 <http://www.encyclopedia.com>.
"hiccup." A Dictionary of Nursing. Oxford University Press. 2008. Encyclopedia.com. (July 10, 2009). http://www.encyclopedia.com/doc/1O62-hiccup.html
"hiccup." A Dictionary of Nursing. Oxford University Press. 2008. Retrieved July 10, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O62-hiccup.html