RF, R., JM, C., MP, C., O, M., P, D., MF, R., . . . AM, A. (2008). Hydrocodone/acetaminophen and tramadol chlorhydrate combination tablets for the management of chronic cancer pain: A double-blind comparative trial. The Clinical journal of pain, 24(1), 1. https://doi.org/10.1097/AJP.0b013e318156ca4d
Chicago Style (17th ed.) CitationRF, Rodriguez, Castillo JM, Castillo MP, Montoya O, Daza P, Rodríguez MF, Restrepo JM, León ME, and Angel AM. "Hydrocodone/acetaminophen and Tramadol Chlorhydrate Combination Tablets for the Management of Chronic Cancer Pain: A Double-blind Comparative Trial." The Clinical Journal of Pain 24, no. 1 (2008): 1. https://doi.org/10.1097/AJP.0b013e318156ca4d.
MLA (9th ed.) CitationRF, Rodriguez, et al. "Hydrocodone/acetaminophen and Tramadol Chlorhydrate Combination Tablets for the Management of Chronic Cancer Pain: A Double-blind Comparative Trial." The Clinical Journal of Pain, vol. 24, no. 1, 2008, p. 1, https://doi.org/10.1097/AJP.0b013e318156ca4d.