John Gray, Ph.D text Jakarta pt gramedia pustaka utama 2006 id 424 hlm. ; 21 cm 177 GRA m 979-605-724-7 241224 20241224114921 INLIS000000000015345 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)