na YOGYA000000000082093 20140823101246 010-081400000081810 DEP 004.678 Zam P Panduan Praktis Memblokir Situs Porno Efvy Zamidra Zam Yogyakarta Gava Media 2009 viii, 151 hlm. ilus. 20 cm. 2009 - 716 2009 - 715