Co-Authors Afif Alfiyanto afni afriani afni afriani Afni Afriani lubis Agnes Monica Simanullang Alfiyanto, Afif Ayu sri Banurea, Juni Susanti Devi yanti Caniago Dina Sari Gea elsa novita Feby Mon Harahap Gaol, Risma Mariva Tua Lumban Grace Merry C.D Harahap Harahap, Feby Mon Hasrul Amal Waruwu Henry Sinaga Irnawati Sinaga Jonathan Aldo Juni Susanti Banurea Lambok Pasaribu Nalom Santun Sihombing Nenima Halawa penta juliana Putri Sari Zalukhu rini arfeinsih Sakti Yonni Hamonangan Purba Samuel Urath Susi Santikawati Syukurman Niat Aro Bidaya Ulinniam Ulinniam Ulinniam, Ulinniam