Dwi-Primayanti, I D. A. I., Aman, I G. M., AND Agus-Bagiada, N.. " IPOMOEA BATATAS SYRUP DECREASE MALONDIALDEHYDE AND INCREASE NITROUS OXIDE PLASMA LEVELS AMONGST MODERATE SMOKER WORKERS AT DENPASAR" BALI MEDICAL JOURNAL [Online], (4 February 2013)