Ramadhani, Beytri, and Paulus B. Notopuro. 2021. “DIFFERENCES VALUE OF PT AND APTT IN EXAMINATION OF ELECTROMECHANICAL AND PHOTO-OPTICAL METHOD”. Journal of Vocational Health Studies 5 (1):17-21. https://doi.org/10.20473/jvhs.V5.I1.2021.17-21.