by $5.00
by Andi Widjajanto, dkk $7.00
by Marihot P. Siahaan, S.E. $12.00
by Sandra Brown $9.00
by Prof. Dr. dr. Sarwono Waspadji, Kartini Sukardji $7.00
by Ryna Merary Siahaan & Heineman Ihsan $13.00