SIAGIAN, Sondang p text Jakarta Rineka cipta 2004 cet. 2 ind IND xvii, 238 hlm 21 cm. Sondang P. Siagian Bibliografi hlm. 235-238 Motivasi 658.64 658.64 Sia t 979-518-383-4 190509 20141118090306.0 INLIS000000000004251 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)