Mohammad Tri Wahyudi, S.Pd. text Sleman Yogyakarta PT. Skripta Media Creative 2011 80 hlm.; Cet I 621.82 180916 20180916013227 INLIS000000000005716 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)