by Drs. Save M. Dagun $9.00
by Prof. DR. Taliziduhu Ndraha $12.00
by Prof. Dr. Suharsimi Arikunto $6.00
by A. Sumarwan, SJ $0.00
by Denny J. A $11.00
by Drs. Amin Widjaja Tunggal, Ak., M.B.A $7.00