1.
Sayasemawong S, Nakjun S. An Improvement of English Listening Ability of Wing 5 Air Force Officers Receiving Instruction with the Guidebooks Combined with Test-based Tutoring. Ratchaphruek [internet]. 2014 Aug. 31 [cited 2026 Aug. 28];12(2):112-8. available from: https://so05.tci-thaijo.org/index.php/Ratchaphruekjournal/article/view/240685