Silalahi, Ulber text jbi Bandung Refika Aditama 2009 Cet.1. ind xx, 514 hlm. ; 29 cm Ulber Silalahi Bibliografi : hlm 515-518 PENELITIAN SOSIAL 300.72 300.72 Sil m 979-1073-61-9 140314 20151027111235.0 INLIS000000000001498 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)