R & D Sugiyano text Bandung Alfabeta 2019 444 : ilus ; 13x20 cm ada Penelitian 001 001 SUG m Ada 20231205102654 INLIS000000000009099 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)