Chantharattana W. The Development of Learning Achievement and Basic Research Skills by Using Instructional Package on Research for Development of Learning Innovation (Code 1043407-62) for 3rd year Student Teachers of Phetchaburi Rajabhat University. dpssj [internet]. 2026 Aug. 18 [cited 2026 Oct. 4];5(2):149-66. available from: https://so08.tci-thaijo.org/index.php/dpssj/article/view/6588