by Ajip Rosidi $7.00
by MarkPlus & Co $16.00
by Prof. Dr. Sondang P. Siagian, M.P.A $9.00
by F.X. Djumialdji, S.H $7.00
by Kerry Patterson, Joseph Grenny, Ron McMillan, Al Switzler $12.00
by Prof. DR. Sukardjo $7.00