Borup, M. B., & Middlebrooks, E. J. (1987). Pollution control in the petrochemicals industry. Lewis Publishers.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিBorup, M. Brett, এবং E. Joe Middlebrooks. Pollution Control in the Petrochemicals Industry. Chelsea, Mich: Lewis Publishers, 1987.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিBorup, M. Brett, এবং E. Joe Middlebrooks. Pollution Control in the Petrochemicals Industry. Lewis Publishers, 1987.