by $6.00
by WK $12.00
by Prof. dr. Arjatmo Tjokronegoro, Ph.D $5.00
by Prof. DR. dr. S.M. Lumbantobing, SpS(K), SpKJ $6.00
by Prof. Dr. dr. Siti A. Boediardja, dr. Titi Lestari Sugito $7.00