Firas Al-Helly และ Fuziah Ibrahim. (2013) Using the Photo Album Test, To Scale a Visitor Attention in Car Showroom. <i>International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies</i>, <i>4</i>(1), 67-79.Firas Al-Helly และ Fuziah Ibrahim. "Using the Photo Album Test, To Scale a Visitor Attention in Car Showroom". International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies 4 (2013):67-79.Firas Al-Helly และ Fuziah Ibrahim. Using the Photo Album Test, To Scale a Visitor Attention in Car Showroom. TUENGR Group:ม.ป.ท. 2013.