by Prof. DR. S.P. Siagian, M.P.A $9.00
by Drs. Heryando Palar $7.00
by Drs. K. Permadi, S.H $7.00
by John Adair $9.00
by Drs. G. Kartasapoetra, dkk $7.00
by Kak Seto (Kata Pengantar) $9.00