by Hudoro Sameto, MBA $6.00
by Prof. J. Suprapto, M.A. APU $16.00
by Prof. Dr. Sondang P. Siagian, M.P.A $11.00
by Seno Gumira Ajidarma $10.00
by ISEI $11.00
by Bilson Simamora $13.00
by Anwar, Moh. Arsjad, dkk $9.00
by WK $13.00
by - $12.00