by Bachtiar Ibrahim $12.00
by Dr. Lijan Poltak Sinambel, M.M., M.Pd., dkk $9.00
by Dr. Farida Rahim, M.Ed $7.00
by Indriyanto $0.00
by Swasono, Sri-Edi, & Masri Singarimbun (Ed) $7.00
by Prof. Anas Sudijono $12.00