Chatchawan Pluemsumran The Development of instructional package for teaching group singing in prathomsuksa 5 level. Thesis (M.A. (Music))--Mahidol University, 2000. Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/107154
Title
The Development of instructional package for teaching group singing in prathomsuksa 5 level