Kerot, Thanatorn, 		Deesamer, Kornkanok, 		Sanonok, Arisa, 		Baobuangoen, Jidapa, AND 		Pornsing, Choosak.
" A Critical Study of Transportation Cost in Inland Road Transportation Business" <em>Naresuan University Journal: Science and Technology (NUJST)</em> [Online], Volume 29 Number 4 (6 May 2021)