Preutthipan, Siripong. 2021. “COMPETITIVE PERFORMANCE OF RAIL TRANSPORTATION AND FRIENDLY ENVIRONMENT: A CASE STUDY OF THE USE OF AIR-CONDITIONED POWER VAN CAR (APVC) IN STATE RAILWAY OF THAILAND”. Srinakharinwirot University Journal of Sciences and Technology 13 (26, July-December):106-20. https://ph02.tci-thaijo.org/index.php/swujournal/article/view/246246.