00000nam 2200000 4500 INLIS000000001251237 20230524101142 0010-0523000793 ta 230524################g##########0#ind## 978-602-271-043-1 001.42 001.42 DAH m Dahlan, M. Sopiyudin MENELAAH VALIDITAS PENELITIAN OBSERVASIONAL / M. Sopiyudin Dahlan ed. 19 Jakarta : Sagung Seto, 2014 x, 119hlm : ilustrasi ; 24 cm PENELITIAN