by Prof. DR. dr. S.M. Lumbantobing, SpS(K), SpKJ $7.00
by W.A.R. Thomson $6.00
by WK $13.00
by Nursalam $12.00
by Prof. dr. Sjaiful Daili, dr. Wresti Indriatmi B.M. $9.00
by Widyasari Kumala $8.00