by Andrias Harefa $7.00
by Roger Leroy $16.00
by Eileen Rachman (Kata Pengantar) $7.00
by F. Suryatmo $6.00
by Suwasono Heddy $6.00
by Prof. Dr. Oemar Hamalik $9.00
by Drs. Rudy T. Erwin, S.H $11.00