Kittichontawat, A., M. Chaovapan, and P. Kulapongs. “Northern Thai Hemogram. III Hemoglobin and Hematocrit Values in Healthy Teenagers”. Journal of Associated Medical Sciences, vol. 4, no. 1, Jan. 2015, p. 25, https://he01.tci-thaijo.org/index.php/bulletinAMS/article/view/60678.