Theresia D Arini Leman, Ferial H Idris, and I Nyoman Murdana. 1. “Changes in Craniovertebral Angle and Sagittal Shoulder Angle: Comparation Between Modified Backpack and Conventional Backpack Users in 11- 12 Aged Boys”. Indonesian Journal of Physical Medicine and Rehabilitation 2 (01), 106 -13. https://doi.org/10.36803/ijpmr.v2i01.232.