by Sei H. Dt. Tombak Alam $5.00
by Dra. Ahmad Rohani H.M., M.Pd $9.00
by Prof. Dr. Suharsimi Arikunto $13.00
by Edgar Morin $6.00
by Bob Messing $7.00
by Drs. H. Malayu S.P. Hasibuan $11.00