by P. A. Elliot $9.00
by Prof. Dr. Umar Tirtarahardja dan Drs. La Sula $12.00
by Prof. Dr. Husaini Usman, M.Pd & R. Purnomo Setiady Akbar, S.Pd., M.Pd $11.00
by Drs. Jumingan, S.E., M.M., M.Si $11.00
by Ir. A. G. Kartasapoetra $6.00
by Leech, Geoffrey $7.00