Fontanarosa, Phil B., and Stacy Christiansen. "Conventional Units and SI Units in JAMA and the Archives Journals." AMA Manual of Style. 20090401. Oxford University Press. Date of access 23 May. 2013, <http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-div1-192>.
Fontanarosa, P., & Christiansen, S. (20090401). Conventional Units and SI Units in JAMA and the Archives Journals. AMA Manual of Style. Retrieved 23 May. 2013, from http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-div1-192.
Fontanarosa, Phil B., and Stacy Christiansen. "Conventional Units and SI Units in JAMA and the Archives Journals." AMA Manual of Style. 23 May. 2013. http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-div1-192.
Fontanarosa PB, Christiansen S. Conventional units andSI units in JAMA and the Archives Journals. 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-div1-192. Accessed May 23, 2013.