by $6.00
by WK $11.00
by Chung Su Hoo & Ng Gek Lan $5.00
by S. Soegijanto $11.00
by Syaifuddin $12.00
by Aziz Alimul $11.00
by Edward Aspinnal $9.00
by Prof. Dr. Suharsimi Arikunto $11.00
by George W. Barclay $7.00
by Aji Supriyanto $16.00
by Aziz Alimul $9.00
by Murad Wilfred Hoffman $7.00