Co-Authors DAMANIK, INDRA JAYANTI GULTOM, SARIAMAN Imman Yusuf Sitinjak Krissi Wahyuni Saragih Mariah S M. Purba Mariah SM Purba Muhammad Arya Ananda Rabiah, Dewi Renna Purba Rony Andre CH Naldo Rosita Nainggolan Saragih, Krissi Wahyuni Sariaman Gultom Sirait, Iuska Roito Suandy Predy Saputra Rumahorbo Sulfansa Almiza Van Lodewijk Purba Zihan Anggun Sofi