by Prof. Drs. S. Pamudji, M.P.A $7.00
by Drs. Abdul Chaer dan Leonie Agustina $11.00
by $6.00
by Kerry Patterson, Joseph Grenny, Ron McMillan, Al Switzler $12.00
by Alex Wipperfurth $12.00
by Drs. Abas Kartadinata $7.00