by Prof. Dr. Umar Fahmi Achmadi, M.P.H., Ph.D $11.00
by Prof. C.J. Ebrahim $6.00
by Prof. Dr. dr. H. Dadang Hawari, Psikiater $7.00
by John W. Amstrong $6.00
by Brooks $20.00
by Kusumoputro, Sidiarto dkk $9.00