by Prof. Dr. Soemarmo Markam $6.00
by Tarwoto $9.00
by Aziz Alimul $9.00
by WK $11.00
by Prof. DR. dr. S.M. Lumbantobing, SpS(K), SpKJ $5.00
by Brooks $20.00
by $7.00
by WK $13.00
by F. Yuce Anwar, S.Pd. $9.00