by Christopher Flavin, Nicholas Lenssen $6.00
by Gunawan Wijaya dan Ahmad Yani $7.00
by Audrey Kahin $18.00
by Drs. Abdulsyani $9.00
by Rai Wijaya $7.00
by Mike Freedman $11.00
by Lembaga Kajian Hukum Bisnis FH USU Medan $6.00