by Dr. B. Siswanto Sastrohadiwiryo $12.00
by Jamrin Abubakar $15.00
by Gunawan Widjaja & Kartini Mulyadi $7.00
by Julius R. Latumaerissa, S.E., M.M $7.00
by Drs. Syaiful Bahri Djamarah $9.00
by Fachruddin H.S $6.00