Mercaptopurine tablet. Mylan Pharmaceuticals Inc. U.S. National Library of Medicine, National Institutes of Health, DailyMed. Accessed February 14, 2015 from http://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=15904472-4c32-4224-95d3-eb131a7ff9c8
Mercaptopurine. Clinical Pharmacology Online, 2014 Elsevier/Gold Standard. Accessed February 14, 2015 from http://clinicalpharmacology-ip.com.ezproxy.samford.edu/Forms/drugoptions.aspx?cpnum=376&n=Mercaptopurine%2c+6-MP&t=0
Mercaptopurine. Lexi-Comp ONLINE. 2014 Lexi-Comp, Inc. Accessed February 14, 2015 from http://www.crlonline.com.ezproxy.samford.edu/lco/action/doc/retrieve/docid/patch_f/7252