by Jamrin Abubakar $15.00
by Kartini Kartono $6.00
by - $7.00
by Drs. H. Burhanuddin Salam, M.M $9.00
by Dr. Sofyan Syafri Harahap, M.S,Ac $7.00
by Drs. Firman B. Aji dan Drs. Martin Sirait $9.00