by John W. Amstrong $6.00
by Prof. Dr. Umar Fahmi Achmadi, M.P.H., Ph.D $9.00
by Iin Inayah $11.00
by Dr. Kunto Witiarto $7.00
by Prof. dr. Peter Kabo Ph.D., dr. Sjukri Karim $7.00
by Iwan T. Budiarso $7.00