المصادر
(1) http://www.csp-state.net/wp-content/uploads/2014/07/Eng-Day-1new.pdf. Accessed 19 Oct. 2017.
(2) National Academies of Sciences, Engineering, and Medicine. (2016). Chemical Laboratory Safety and Security: A Guide to Developing Standard Operating Procedures. Committee on Chemical Management Toolkit Expansion: Standard Operating Procedures. Washington, DC: The National Academies Press. doi: 10.17226/21918.