by $5.00
by Tarwoto $9.00
by Nursalam $12.00
by Sigfrid Fregert $5.00
by Katzung $30.00
by Prof. Dr. Umar Fahmi Achmadi, M.P.H., Ph.D $11.00
by Drs. Amin Wijaja Tunggal, M.B.A $7.00