Fontanarosa, Phil B., and Stacy Christiansen. "Units of Measure." AMA Manual of Style: A Guide for Authors and Editors. New York, NY: Oxford University Press, 20070301. AMA Manual of Style. 20090401. Date Accessed 19 Jun. 2013 <http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-chapter-18>.
Fontanarosa, P., & Christiansen, S.(20070301). Units of Measure. In AMA Manual of Style: A Guide for Authors and Editors. New York, NY: Oxford University Press. Retrieved 19 Jun. 2013, from http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-chapter-18.
Fontanarosa, Phil B., and Stacy Christiansen. "Units of Measure." In AMA Manual of Style: A Guide for Authors and Editors. New York, NY: Oxford University Press, 20070301. http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-chapter-18.
Fontanarosa PB, Christiansen S. Units of measure. 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-chapter-18. Accessed June 19, 2013.