Endodan (Oxycodone and aspirin) tablets. Endo Pharmaceuticals Inc. U.S. National Library of Medicine, National Institutes of Health, DailyMed. Accessed February 25, 2013 from http://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=bbb6aa31-8f6a-47f7-8d75-757e35443695
Aspirin, ASA; Oxycodone. Clinical Pharmacology Online, 2013 Elsevier/Gold Standard. Accessed February 25, 2013, from http://clinicalpharmacology-ip.com.ezproxy.samford.edu/Forms/drugoptions.aspx?cpnum=890&n=Aspirin%2c+ASA%3b+Oxycodone&t=0
Oxycodone and aspirin. Lexi-Comp ONLINE. 2013 Lexi-Comp, Inc. Accessed February 25, 2013 from http://www.crlonline.com.ezproxy.samford.edu/lco/action/doc/retrieve/docid/patch_f/7418