Speegle, M. (2013). Safety, health, and environmental concepts for the process industry (2nd ed.). Delmar, Cengage Learning.
Chicago-viite (17. p.)Speegle, Michael. Safety, Health, and Environmental Concepts for the Process Industry. 2nd ed. Clifton Park, NY: Delmar, Cengage Learning, 2013.
MLA-viite (9. p.)Speegle, Michael. Safety, Health, and Environmental Concepts for the Process Industry. 2nd ed. Delmar, Cengage Learning, 2013.
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