by Prof. Dr. Umar Fahmi Achmadi, M.P.H., Ph.D $11.00
by Drs. Amin Widjaja Tunggal, Ak., M.B.A $11.00
by George W. Barclay $9.00
by - $11.00
by Daradjadi Gondodiprojo $6.05
by Djamin, Zulkarnain $5.00