Iverson, Cheryl, Stacy Christiansen, Annette Flanagin, Phil B. Fontanarosa, Richard M. Glass, Brenda Gregoline, Stephen J. Lurie, Harriet S. Meyer, Margaret A. Winker, and Roxanne K. Young. "Number Spacing." AMA Manual of Style: A Guide for Authors and Editors. New York, NY: Oxford University Press, 20070301. AMA Manual of Style. 20090401. Date Accessed 22 May. 2013 <http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-div2-486>.
Iverson, C., Christiansen, S., Flanagin, A., Fontanarosa, P., Glass, R., Gregoline, B., Lurie, S., Meyer, H., Winker, M., & Young, R.(20070301). Number Spacing. In AMA Manual of Style: A Guide for Authors and Editors. New York, NY: Oxford University Press. Retrieved 22 May. 2013, from http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-div2-486.
Iverson, Cheryl, Stacy Christiansen, Annette Flanagin, Phil B. Fontanarosa, Richard M. Glass, Brenda Gregoline, Stephen J. Lurie, Harriet S. Meyer, Margaret A. Winker, and Roxanne K. Young. "Number Spacing." 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-div2-486.
Iverson C, Christiansen S, Flanagin A, et al. Number Spacing. 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. http://www.amamanualofstyle.com/view/10.1093/jama/9780195176339.001.0001/med-9780195176339-div2-486. Accessed May 22, 2013.