by Anwar, Moh. Arsjad, dkk $9.00
by Cepi Triatna, S.Pd $7.00
by Fairhurst, Michael C $6.00
by Prof. Dr. S. Nasution, M.A. $7.00
by G. Sexilla, Cousuelo, dkk $7.00
by Perserikatan Bangsa-Bangsa $7.00
by Walker, Edward L $6.00