by Prof. DR. Taliziduhu Ndraha $11.00
by Purbowaseso, Bambang $7.00
by Harry Simons $12.00
by Masduki $6.00
by Gustian Djuanda & Irwansyah Lubis $11.00
by Rosady Ruslan $12.00
by Kasmir, S.E., M.M $11.00