by Hasbullah $11.00
by G. Kartasapoetra dan R. G. Kartasapoetra, S.H $6.00
by Prof. Komaruddin $11.00
by Prof. Dr. Suharsimi Arikunto $18.00
by William J. Goode $9.00
by Prof. Dr. S. Nasution, M.A. $6.00