by Prof. Dr. Prayitno dan Drs. Erman Amti $13.00
by Budi Agus Riswandi $9.00
by EKM Masinamboum $8.00
by Mangasa Sidabutar $7.00
by Zainal Asikin, dkk $9.00
by Mark Powell $6.00
by Drs. Save M. Dagun $9.00
by Victor Situmorang, S.H $7.00
by Malvino $20.00
by - $11.00
by Trijoto $8.00
by Prof. Dr. Budi Winarno $9.00