Putra, Yudi, 		Widnyana, M., AND 		Saraswati, Ni Luh Putu Gita Karunia.
" Combination Intervention Mulligan’s  Sustained Natural Apophyseal Glides and Ultrasounds Better Than Combination Intervention Stretching And Ultrasounds For Increasing Functional Activity  Non-Specific Low Back Pain Patient" <em>Sport and Fitness Journal</em> [Online], Volume 10 Number 1 (29 March 2022)