by Prof. Dr. Suharsimi Arikunto, dkk
$7.00

by dr. Gregory Budiman
$6.00

by dr. Yefta Moenadjat, SpBP
$5.00

by Wayne L. Wesscott
$9.00

by Prof. DR. dr. S.M. Lumbantobing, SpS(K), SpKJ
$6.00

by Dr. Lijan Poltak Sinambel, M.M., M.Pd., dkk
$9.00