by Prof. Dr. S. Nasution, M.A. $7.00
by Melati Ferianita Fachrul $7.00
by Drs. H. Hamdan Aini $9.00
by Prof. H.M. Arifin, M.Ed $9.00
by Prof. Subowo, dr. M.Sc., Ph.D $7.00
by Syahrin Harahap $9.00
by DR. Andi Hamzah, S.H $12.00