by Drs. R. Suharno $6.00
by Prof. Dr. Sondang P. Siagian, M.P.A $11.00
by Drs. Muchdarsyah Sinungan $9.00
by $13.00
by Drs. Heryando Palar $7.00
by Drs. Nanang Gojali, M.Ag $7.00