by H. Sony Sugema, MBA $7.00
by Drs. Ibnu Syamsi, S.U $6.00
by Michael P. Todaro $16.00
by $13.00
by Prof. Dr. Sondang P. Siagian, M.P.A $11.00
by Drs. Amin Widjaja Tunggal, Ak., M.B.A $6.00
by $9.00