by Dr. Ahmad Rofiq, MA $12.00
by Prof. Dr. Syahrin Harahap MA (Ed) $6.00
by Burhan Bungin $9.00
by M. Abdul Ghoffar, E.M $9.00
by Drs. S. Margono $9.00
by Jajat Burhanuddin $11.00
by Gauzali Saydam $9.00
by Prof. Subowo, dr. M.Sc., Ph.D $9.00
by $6.00