Pratuang Funkeaw และผู้แต่งคนอื่นๆ. (2017) The Design and Construction of a Biogas Pressure Regulator for an Internal Combustion Engine. <i>RMUTL Engineering Journal</i>, <i>2</i>(1), 55-61.Pratuang Funkeaw และผู้แต่งคนอื่นๆ. "The Design and Construction of a Biogas Pressure Regulator for an Internal Combustion Engine". RMUTL Engineering Journal 2 (2017):55-61.Pratuang Funkeaw และผู้แต่งคนอื่นๆ. The Design and Construction of a Biogas Pressure Regulator for an Internal Combustion Engine. Rajamangala University of Technology Lanna:ม.ป.ท. 2017.