by Prof. Dr. Sondang P. Siagian, M.P.A $11.00
by Prof. Dr. Sondang P. Siagian, M.P.A $9.00
by Dr. Ibrahim Bafadal, M.Pd $6.00
by Redaksi (Penghimpun) $7.00
by Cik Hasan Bisri $11.00
by Andrias Harefa $7.00