Pimlada Rujisavettapan และ Pramuk Osiri. (2015) Non-conformity to the occupational health and safety assessment specification in the management of an aluminium manufacturing plant in Phra Nakhon Si Ayutthaya. Mahidol University:ม.ป.ท.Pimlada Rujisavettapan และ Pramuk Osiri. 2015. Non-conformity to the occupational health and safety assessment specification in the management of an aluminium manufacturing plant in Phra Nakhon Si Ayutthaya. ม.ป.ท.:Mahidol University;Pimlada Rujisavettapan และ Pramuk Osiri. Non-conformity to the occupational health and safety assessment specification in the management of an aluminium manufacturing plant in Phra Nakhon Si Ayutthaya. ม.ป.ท.:Mahidol University, 2015. Print.