W. Songsuwan และ N. Wattanasakulpong. (2020) Amplitude analysis of functionally graded beams under linear decreasing and exponential loads. <i>Journal of Research and Applications in Mechanical Engineering (JRAME)</i>, <i>8</i>(1), 1-10.W. Songsuwan และ N. Wattanasakulpong. "Amplitude analysis of functionally graded beams under linear decreasing and exponential loads". Journal of Research and Applications in Mechanical Engineering (JRAME) 8 (2020):1-10.W. Songsuwan และ N. Wattanasakulpong. Amplitude analysis of functionally graded beams under linear decreasing and exponential loads. Thai Society of Mechanical Engineers (TSME):ม.ป.ท. 2020.