Borup, M. B., & Middlebrooks, E. J. (1987). Pollution control in the petrochemicals industry. Lewis Publishers.
Lua i Stíl Chicago (17ú heag.)Borup, M. Brett, agus E. Joe Middlebrooks. Pollution Control in the Petrochemicals Industry. Chelsea, Mich: Lewis Publishers, 1987.
Lua MLA (9ú heag.)Borup, M. Brett, agus E. Joe Middlebrooks. Pollution Control in the Petrochemicals Industry. Lewis Publishers, 1987.
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