by WK $13.00
by Th. Endang Purwoastuti $5.00
by Aziz Alimul $9.00
by Nalbandov, A.V $7.00
by Prof. dr. Hadiarto Mangunnegara, dr. Dianiati $11.00
by Prof. Dr. Nur Nasry Noor, M.P.H $6.00