Jirawat Boonjun และ Niti Kammuang-lue. (2016) Effect of engine speeds and duty cycle percentages of fuel injection on actual fuel injection rate. <i>KKU Engineering Journal</i>, <i>43</i>(S1), 87-91.Jirawat Boonjun และ Niti Kammuang-lue. "Effect of engine speeds and duty cycle percentages of fuel injection on actual fuel injection rate". KKU Engineering Journal 43 (2016):87-91.Jirawat Boonjun และ Niti Kammuang-lue. Effect of engine speeds and duty cycle percentages of fuel injection on actual fuel injection rate. Faculty of Engineering, Khon Kaen University:ม.ป.ท. 2016.