Norshahira O, Norashida SR, Lukman ZM. Content Validity Determination of the Suicidal Ideation Behaviour Assessment Instruments Using Content Validity Ratio (CVR) Formula: SUICIDAL IDEATION BEHAVIOUR ASSESSMENT. J. Drug Delivery Ther. 2021;11(4-S):81-85. doi:10.22270/jddt.v11i4-S.4968