McGregor, Bruce, and Harriet S. Meyer. "Letter-by-Letter vs Word-by-Word." AMA Manual of Style. 20090401. Oxford University Press. Date of access 19 Jun. 2013, <http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-div2-360>.
McGregor, B., & Meyer, H. (20090401). Letter-by-Letter vs Word-by-Word. AMA Manual of Style. Retrieved 19 Jun. 2013, from http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-div2-360.
McGregor, Bruce, and Harriet S. Meyer. "Letter-by-Letter vs Word-by-Word." AMA Manual of Style. 19 Jun. 2013. http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-div2-360.
McGregor B, Meyer HS. Letter-by-letter vs word-by-word. In: AMA Manual of Style: A Guide for Authors and Editors. New York, NY: Oxford University Press; 2007. http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-div2-360. Accessed June 19, 2013.