Simbolon, S. . “Application of Theory of Reasoned Action in Predicting the Consumer Behavior to Buy the Toyota Avanza Veloz at Pt. Putera Auto Perkasa Medan”. Journal of Asian Scientific Research, vol. 5, no. 7, July 2015, pp. 357-72, doi:10.18488/journal.2/2015.5.7/2.7.357.372.