Kristianto, Puji, 		Ilminnafik, Nasrul, AND 		Ramadhan, Mochamad.
" Analisis Torsi Motor Bakar 4 Langkah Berbahan Bakar LPG dengan Beda Sudut Pengapian" <em>STATOR: Jurnal Ilmiah Teknik Mesin</em> [Online], Volume 1 Number 1 (1 January 2018)