by Prof. Dr. Suharsimi Arikunto
$18.00

by Drs. Ngadijo A.J
$6.00

by Drs. Husein Umar, S.E., M.M., MBA
$13.00

by Prof. Mr. Roeslan Saleh
$7.00

by Rimsky K. Judisseno
$32.00

by Drs. Amin Widjaja Tunggal, Ak., M.B.A
$9.00