by Ir. Sukim Prayitno $5.00
by Ir. M. Lies Suprapti $5.00
by Pindi Kisata $7.00
by - $12.00
by Prof. Dr. Sondang P. Siagian, M.P.A $11.00
by Fritz Wilkening $12.00
by Prof. Dr. Mr. Gregor van der Burght, Penerjemah: Drs. F. Tengker, S.H., C.N. $7.00
by Sprent, P. $7.00
by Adiwarman Karim $13.00
by Rumsari Hadi Sumarto & Lukas Dwiantara $7.00