by Prof. Dr. Suharsimi Arikunto $18.00
by Sindhunata $9.00
by JB. Kristanto, Christina M. Udiani $16.00
by P. Joko Subagyo, S.H $7.00
by Jan Takasihaeng $7.00
by Budi Widianarko & Andreas Pandiangan $11.00