by Prof. Dr. Husaini Usman, M.Pd & R. Purnomo Setiady Akbar, S.Pd., M.Pd $11.00
by Hermawan Kartajaya & Yuswohady $11.00
by Michael P. Todaro $16.00
by Jamrin Abubakar $15.00
by Andrew E. B. Tani $18.00
by Kartadjoemena, H.S $7.00
by Rofi'l $5.00
by Hendra Utomo $11.00