สรรพศรี เ. and ฉัพพรรณรัตน์ ย. 2019. A Study of Folk Lanna Music Instruction for Elderly: A Case Study of Kru Prommate Sabpasri (Traditional Thai Northern Folk Music Teacher). Journal of Fine and Applied Arts Khon Kaen University. 11, 2 (Dec. 2019), 49–74.