PERRY, R. H. (1976). Engineering Manual A. Practical Reference Of Design Methods And Data Building System, Chemical, Civil, Electrical, Mechanical And Enviromental Engineering And Enegy Conversion Robert H. Perry. McGraw-Hill.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিPERRY, Robert H. Engineering Manual A. Practical Reference Of Design Methods And Data Building System, Chemical, Civil, Electrical, Mechanical And Enviromental Engineering And Enegy Conversion Robert H. Perry. McGraw-Hill, 1976.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিPERRY, Robert H. Engineering Manual A. Practical Reference Of Design Methods And Data Building System, Chemical, Civil, Electrical, Mechanical And Enviromental Engineering And Enegy Conversion Robert H. Perry. McGraw-Hill, 1976.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.