Co-Authors Ardi Ardi Barham Siregar Br. Bangun, Nirwana Efrizah, Doni Hani, Sheila Herlina H Hetty Elfina Ismayani Ismayani julian, julian Karim, Ahmad Khairuddin Tampubolon Khairul Saleh Mahuli, Jenda Ingan Misdawati, Misdawati Musri S, Muhammad Ali RINI RINI Sibuea, Nunti Supriono Supriono Yusri Yusri