by Gavin Keunedy $11.00
by Isjoni $8.00
by Drs. Ibnu Syamsi, S.U $9.00
by Drs. H. Inu Kencana Syafiie, M.Si $9.00
by Freemont E. Kast $13.00
by Prof. Dr. Suharsimi Arikunto $11.00