Não informado. (1985). Building Services. Chartered Institution of Building Services Engineers.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Building Services. London: Chartered Institution of Building Services Engineers, 1985.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Building Services. Chartered Institution of Building Services Engineers, 1985.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.