3 D E L T A G U R U T I N G K A T A N : P N . N U R U L A I N I F A T I H A H B I N T I W A H A B K E T U A T I N G K A T A N : M U H A M M A D M I R Z A Z H A R F A N B I N N O R S A I F U L A M R A N @ S M K M N 109