5 1 20 Ali Sumara El Khomeiny Primary Author FALLDY PRIMANTA Additional Author Sjahrial Nasution Additional Author mixed material ISSN2407635X ITL Trisakti 2019 Sjahrial Nasution Additional Author FALLDY PRIMANTA Additional Author ALI SUMARA EL KHOMEINEY Primary Author mixed material 2407635X 2019 Rizky Dwi Putra Primary Author FN Rahmasari Primary Author Sjahrial Nasution Primary Author Berlian Badarusman Primary Author MR Affiat Primary Author mixed material 26225778 Jakarta ITL Trisakti 2019 JDM Febryani Primary Author WFJ Hutagalung Primary Author Sjahrial Nasution Primary Author Rini Setiawati Primary Author Taufik MR Primary Author mixed material 26225778 Jakarta ITL Trisakti 2019 A Case Study DN Gunarse Primary Author FA Ramadhan Primary Author Sjahrial Nasution Primary Author David Arosochi Lasse Primary Author S Ekawardana Primary Author mixed material 26225778 Jakarta ITL Trisakti 2019