Pengsri N. The Development of English Speaking Ability for Communication of the 4th Year Students of Lampang Rajabhat University. Humanities and Social Sciences Nakhonsawan Rajabhat University Academic Journal [internet]. 2022 Jul. 1 [cited 2026 Sep. 23];9(1):179-92. available from: https://so05.tci-thaijo.org/index.php/hssnsru/article/view/254763