na YOGYA-03110000000296 20150428144129.0 ind 0010-031100000000296 YOPDYOG 001.42 001.42 Gul M Gulo, W Metodologi penelitian / W. Gulo Jakarta Gramedia 2007 262 hlm. ; 21 cm. Penelitian YOPDYOG 39352-PD/A.09 39351-PD/A.09