by Prof. Dr. Suharsimi Arikunto $18.00
by Aziz Alimul $9.00
by dr. Pantjita Hardjasasmita (Alm) $6.00
by ISEI $18.00
by Ronny Sautma Hotma Bako, S.H., M.H. $3.00
by WK $12.00
by $6.00
by Sandra Brown $12.00
by Muh. Al Mighwar S.Ag., M.Ag. $7.00