Vitchutda Kultanapong และ Thittapong Daengrasmisopon. (2014) Factors influencing decision to purchase yamaha motorcycle in bang pa-in district, ayutthaya province. Stamford international university:ม.ป.ท.Vitchutda Kultanapong และ Thittapong Daengrasmisopon. 2014. Factors influencing decision to purchase yamaha motorcycle in bang pa-in district, ayutthaya province. ม.ป.ท.:Stamford international university;Vitchutda Kultanapong และ Thittapong Daengrasmisopon. Factors influencing decision to purchase yamaha motorcycle in bang pa-in district, ayutthaya province. ม.ป.ท.:Stamford international university, 2014. Print.