Mengurai variabel hingga instrumentasi Mustafa EQ, Zainal text Yogyakarta Graha Ilmu 2013 ind xv, 244 hal. : ilus. ; 23 cm. Pb'2014 RESEARCH--METHODOLOGY 001.42 9797565473 160923 20160918014137 INLIS000000000014954 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)