by - $13.00
by Sumadi Suryabrata $11.00
by Gunawan Widjaja & Kartini Mulyadi $7.00
by M. Idris Ramulyo, S.H., M.H. $9.00
by Prof. Dr. Soerjono Soekanto, S.H., M.A. & Prof. Purnadi Purbacaraka, S.H. $3.00
by Lembaga Kajian Hukum Bisnis FH USU Medan $6.00