by WK $18.00
by Drs. Daryanto $7.00
by WK $11.00
by WK $12.00
by Aziz Alimul $9.00
by Thomas Cain $9.00
by Prof. Dr. Syahrin Harahap MA (Ed) $6.00
by Darmono $6.00
by Frans H. Winarta (Kata Pengantar) $11.00
by Arifin Suryo Nugroho $4.32