text Jakarta Gramedia 1994 ind 440 halaman : 21 cm. Dr. Thomas Gordon 649.1 649.1 GOR m 979-511-954-0 INLIS000000000001744 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)