อัตตวิริยะนุภาพ ก. German Tenses and Thai Aspect Markers : A Contrastive Study. JASU [internet]. 2020 Feb. 7 [cited 2026 Oct. 14];32(2):7-41. available from: https://so04.tci-thaijo.org/index.php/jasu/article/view/239266