Panngooluem, K., and W. Eungpinichpong. “Reliability and Validity of a ‘WE-CAP’ Device for Measurement of Cervical Range of Motion”. Archives of Allied Health Sciences, vol. 30, no. 2, Sept. 2018, pp. 237-43, https://he01.tci-thaijo.org/index.php/ams/article/view/145465.