Não informado. (1978). International Building Services Abstracts. Building Services Research and Information Association.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. International Building Services Abstracts. Bracknell, Inglaterra: Building Services Research and Information Association, 1978.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. International Building Services Abstracts. Building Services Research and Information Association, 1978.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.