Pruittikorn Smithmaitrie. 2010. Characteristics of the ultrasonic motor with the partially laminated piezoelectric actuation. Songkla:Prince of Songkla University;
Pruittikorn Smithmaitrie. (2010) Characteristics of the ultrasonic motor with the partially laminated piezoelectric actuation (รายงานผลงานวิจัย). Prince of Songkla University:Songkla.
Pruittikorn Smithmaitrie. Characteristics of the ultrasonic motor with the partially laminated piezoelectric actuation. Songkla:Prince of Songkla University, 2010.
Pruittikorn Smithmaitrie. (2010) Characteristics of the ultrasonic motor with the partially laminated piezoelectric actuation (รายงานผลงานวิจัย). Prince of Songkla University:Songkla.