Flanagin, Annette. "Acknowledging Support, Assistance, and Contributions of Those Who Are Not Authors." AMA Manual of Style. 20090401. Oxford University Press. Date of access 20 May. 2013, <http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-div2-129>.
Flanagin, A. (20090401). Acknowledging Support, Assistance, and Contributions of Those Who Are Not Authors. AMA Manual of Style. Retrieved 20 May. 2013, from http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-div2-129.
Flanagin, Annette. "Acknowledging Support, Assistance, and Contributions of Those Who Are Not Authors." AMA Manual of Style. 20 May. 2013. http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-div2-129.
Flanagin A. Acknowledging support, assistance, and contributions of those who are not authors. In: AMA Manual of Style Committee. AMA Manual of Style: A Guide for Authors and Editors. 10th edition ed. New York, NY: Oxford University Press; 2007:140-141. http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-div2-129. Accessed May 20, 2013.