by Drs. Amin Widjaja Tunggal, Ak., M.B.A $9.00
by C. Rollin Niswonger $13.00
by Dr. Zakiah Daradjat, dkk $11.00
by Adiwarman Karim $12.00
by John Tshoh $12.00
by Uken Junaedi $5.77
by Prof. Dr. Sondang P. Siagian, M.P.A $11.00