https://sites.google.com/a/bu.ac.th/procurement-bu-ac-th/kickrrm-khxng-fay/prawati-khwam-pen-ma-kar-thxd-kthin

https://sites.google.com/a/bu.ac.th/procurement-bu-ac-th/phyuhyatra-chlmarkh

https://sites.google.com/a/bu.ac.th/procurement-bu-ac-th/khunthrrm-criythrrm-khxng-phu-brihar