knowledge perception satisfaction loyalty perceived behavior control purchasing subjective norms Conversion Program from Kerosene to LPG Disdukcapil E-KTP Family and Consumer Sciences LPG Mujigae Resto Servqual Theory of Planned Behavior Theory of Planned Behavior (TPB) adolescent affective appeals attitude toward behavior attitudes towards behavior behavior behavior electricity saving behaviour using of household fuel booklet child abuse child behavior cognitive complaint behavior conative consumer consumer behaviour consumer organization content analysis credibility electronic commerce electronic money family farmer card intention intention to use intentions kantong plastik kontrol terhadap perilaku lifestyle medicinal herbs message perception newspaper niat norma subjektif