by Dr. Niels Mulder $11.00
by Dr. K.H. Didin Hafidhuddin, M.Sc $7.00
by Nazir Makarim Syirazi $6.00
by Ir. Daisy P. Sriyadi Hendaryono $6.00
by Drs. Muhsin M.K. S.Ag, M.Sc $7.00
by Dra. Kumara Poespo $12.00