Tochaiwat K, Predeekanit K, Udom T, Srisubat A, Thaiyakul A., “Unit Cost and Break-Even Point of Inpatients Service at the Supreme Patriarch Nyanasanwara Geriatric Medicine Hospital, Chonburi Province”, J DMS, vol. 43, no. 4, pp. 122–126, Aug. 2018.