by Dr. Sofyan Syafri Harahap, M.S,Ac $12.00
by Gilang Priyadi S $11.00
by Drs. Abdulsyani $9.00
by Drs. H. Abu Ahmadi dan Taswa E.S $11.00
by $16.00
by Ir. Bambang Cahyono $7.00
by - $16.00