by Chris Charmichael $7.00
by Prof. Dr. Oemar Hamalik $9.00
by Kemas Ali Hanafiah $9.00
by Prof. Dr. Suharsimi Arikunto $11.00
by Drs. D. Ketut Sukardi $9.00
by Dr. Ibrahim Bafadal, M.Pd $7.00