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শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি.Parr, E. A., E.A .Parr, Bsc, এবং C. .Eng. Industrial Control Handbook. Oxford, England ; Boston : New York: Newnes ; Available in North America from Industrial Press, 1998.
M.L.A (9 ম সংস্করণ) উদ্ধৃতি.Parr, E. A., et al. Industrial Control Handbook. Newnes ; Available in North America from Industrial Press, 1998.