Winker, Margaret A., and Stephen J. Lurie. "The Manuscript: Presenting Study Design, Rationale, and Statistical Analysis." AMA Manual of Style. 20090401. Oxford University Press. Date of access 22 May. 2013, <http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-div1-207>.
Winker, M., & Lurie, S. (20090401). The Manuscript: Presenting Study Design, Rationale, and Statistical Analysis. AMA Manual of Style. Retrieved 22 May. 2013, from http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-div1-207.
Winker, Margaret A., and Stephen J. Lurie. "The Manuscript: Presenting Study Design, Rationale, and Statistical Analysis." AMA Manual of Style. 22 May. 2013. http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-div1-207.
Winker MA, Lurie SJ. The manuscript: presenting study design, rationale, and statistical analysis. In: AMA Manual of Style Committee. AMA Manual of Style: A Guide for Authors and Editors. 10th ed. New York, NY: Oxford University Press; 2007. http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-div1-207. Accessed May 22, 2013.