Prosiding seminar ketahanan nasional Malaysia-IndonesiaAbdul Rahman Abdul Aziz, Ahmad Zaharuddin Sani Ahmad Sabri, Muhamed Nor Azman Nordin, Anwar Sadat Harahap, Shafwan Hadi Umri, Rosmawati Harahap · First published 2014Open the Tome
Tradisi lisan dalam cerita rakyat Sumatera UtaraShafwan Hadi Umri · First published 2012Open the Tome
