by Ziwar Effendi $6.00
by Leden Marpaung, S.H. $9.00
by Herlina Suyati Bachtiar. SH.MBA $8.00
by Edilius, S.E., dkk $9.00
by M. Yahya Harahap, S. H. $20.00
by Prof. Dr. H. Zainuddin Ali, M.A. $7.00